message stringlengths 2 22.8k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 16 109k | cluster float64 1 1 | __index_level_0__ int64 32 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
Little boy Gerald studies at school which is quite far from his house. That's why he has to go there by bus every day. The way from home to school is represented by a segment of a straight line; the segment contains exactly n + 1 bus stops. ... | instruction | 0 | 16 | 1 | 32 |
Tags: binary search, data structures, dp
Correct Solution:
```
a,b=map(int,input().split())
z=[]
g=10**9+7
def f():
return map(int,input().split())
if b==0:
print (0)
else:
s=set()
for i in range(b):
x,y=f()
z.append((x,y))
s.add(x)
s.add(y)
s.add (0)
s.add (a)
... | output | 1 | 16 | 1 | 33 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little boy Gerald studies at school which is quite far from his house. That's why he has to go there by bus every day. The way from home to school is represented by a segment of a straight line; the segment contains exactly n + 1 bus stops. ... | instruction | 0 | 17 | 1 | 34 |
Tags: binary search, data structures, dp
Correct Solution:
```
# by the authority of GOD author: manhar singh sachdev #
import os,sys
from io import BytesIO, IOBase
from bisect import bisect_left as bt
def main():
mod = 10**9+7
n,m = map(int,input().split())
jump,x = [],[]
for i in range(m):
... | output | 1 | 17 | 1 | 35 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little boy Gerald studies at school which is quite far from his house. That's why he has to go there by bus every day. The way from home to school is represented by a segment of a straight line; the segment contains exactly n + 1 bus stops. ... | instruction | 0 | 18 | 1 | 36 |
Tags: binary search, data structures, dp
Correct Solution:
```
a,b=map(int,input().split())
z=[]
g=10**9+7
def f():
return map(int,input().split())
if b==0:
print (0)
else:
s=set()
for i in range(b):
x,y=f()
z.append((x,y))
s.add(x)
s.add(y)
s.add (0)
... | output | 1 | 18 | 1 | 37 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little boy Gerald studies at school which is quite far from his house. That's why he has to go there by bus every day. The way from home to school is represented by a segment of a straight line;... | instruction | 0 | 19 | 1 | 38 |
No | output | 1 | 19 | 1 | 39 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little boy Gerald studies at school which is quite far from his house. That's why he has to go there by bus every day. The way from home to school is represented by a segment of a straight line;... | instruction | 0 | 20 | 1 | 40 |
No | output | 1 | 20 | 1 | 41 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A ski base is planned to be built in Walrusland. Recently, however, the project is still in the constructing phase. A large land lot was chosen for the construction. It contains n ski junctions, numbered from 1 to n. Initially the junctions ... | instruction | 0 | 524 | 1 | 1,048 |
Tags: combinatorics, dsu, graphs
Correct Solution:
```
import sys
from array import array # noqa: F401
def input():
return sys.stdin.buffer.readline().decode('utf-8')
class UnionFind(object):
__slots__ = ['nodes']
def __init__(self, n: int):
self.nodes = [-1] * n
def find(self, x: int) ->... | output | 1 | 524 | 1 | 1,049 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A ski base is planned to be built in Walrusland. Recently, however, the project is still in the constructing phase. A large land lot was chosen for the construction. It contains n ski junctions,... | instruction | 0 | 525 | 1 | 1,050 |
No | output | 1 | 525 | 1 | 1,051 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sonya likes ice cream very much. She eats it even during programming competitions. That is why the girl decided that she wants to open her own ice cream shops.
Sonya lives in a city with n junc... | instruction | 0 | 802 | 1 | 1,604 |
No | output | 1 | 802 | 1 | 1,605 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sonya likes ice cream very much. She eats it even during programming competitions. That is why the girl decided that she wants to open her own ice cream shops.
Sonya lives in a city with n junc... | instruction | 0 | 803 | 1 | 1,606 |
No | output | 1 | 803 | 1 | 1,607 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sonya likes ice cream very much. She eats it even during programming competitions. That is why the girl decided that she wants to open her own ice cream shops.
Sonya lives in a city with n junc... | instruction | 0 | 804 | 1 | 1,608 |
No | output | 1 | 804 | 1 | 1,609 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sonya likes ice cream very much. She eats it even during programming competitions. That is why the girl decided that she wants to open her own ice cream shops.
Sonya lives in a city with n junc... | instruction | 0 | 805 | 1 | 1,610 |
No | output | 1 | 805 | 1 | 1,611 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Berhattan is the capital of Berland. There are n streets running parallel in the east-west direction (horizontally), and there are m avenues running parallel in the south-north direction (vertic... | instruction | 0 | 835 | 1 | 1,670 |
No | output | 1 | 835 | 1 | 1,671 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,067 | 1 | 2,134 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
for _ in range(int(input())):
n=int(input())
st="l"+input()+"r"
forw=[0 for i in range(n+2)]
back=[0 for i in range(n+2)]
i=1
while(i<=n):
if(st[i]=="R" and st[i+1]=="L"):
forw[i+1]=forw[i-1]+2
i... | output | 1 | 1,067 | 1 | 2,135 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,068 | 1 | 2,136 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
t= int(input().strip())
for i in range(t):
n=int(input().strip())
l1=[0]*(n+1)
l2=[0]*(n+1)
s=input()
if s[0]=="L":
l1[1]+=1
for j in range(1,n):
if s[j]=="L":
if l1[j]==0:
l1[j+1]=2+... | output | 1 | 1,068 | 1 | 2,137 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,069 | 1 | 2,138 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
import sys
input = sys.stdin.readline
def main():
t = int(input())
for _ in range(t):
N = int(input())
S = list(input().strip())
S_R = [""] * N
S_L = [""] * N
for i in range(N):
if i % 2 =... | output | 1 | 1,069 | 1 | 2,139 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,070 | 1 | 2,140 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
def main():
T = eval(input())
for _ in range(T):
N=eval(input())
str=input()
dp1=[1]*N
dp2=[1]*N
ans=[1]*(N+1)
for i in range(1,N):
if str[i]!=str[i-1]:
dp1[i]+=dp1[i... | output | 1 | 1,070 | 1 | 2,141 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,071 | 1 | 2,142 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
import sys
input = sys.stdin.readline
import math
import copy
import collections
from collections import deque
import heapq
import itertools
from collections import defaultdict
from collections import Counter
for _ in range(int(input())):
n = int... | output | 1 | 1,071 | 1 | 2,143 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,072 | 1 | 2,144 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
import sys
for tc in range(int(input())):
n = int(sys.stdin.readline().strip())
p = sys.stdin.readline().strip()
L = [0]
Lt = ""
Lc = 0
for i in range(n):
if p[i] == "R":
if Lt == "L":
Lc += ... | output | 1 | 1,072 | 1 | 2,145 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,073 | 1 | 2,146 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
for i in range(int(input())):
n = int(input())
s = input()
t1 = [0]
if s[0] == 'L':
t1.append(1)
else:t1.append(0)
cnt = 1
for i in range(1,n):
if s[i] != s[i-1]:
cnt += 1
else:cnt = 1
... | output | 1 | 1,073 | 1 | 2,147 |
Provide tags and a correct Python 3 solution for this coding contest problem.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a string of n characters such that each character is ... | instruction | 0 | 1,074 | 1 | 2,148 |
Tags: dfs and similar, dp, dsu, implementation
Correct Solution:
```
from collections import defaultdict
from itertools import accumulate
import sys
input = sys.stdin.readline
'''
for CASES in range(int(input())):
n, m = map(int, input().split())
n = int(input())
A = list(map(int, input().split()))
S = input().strip()
... | output | 1 | 1,074 | 1 | 2,149 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,075 | 1 | 2,150 |
Yes | output | 1 | 1,075 | 1 | 2,151 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,076 | 1 | 2,152 |
Yes | output | 1 | 1,076 | 1 | 2,153 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,077 | 1 | 2,154 |
Yes | output | 1 | 1,077 | 1 | 2,155 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,078 | 1 | 2,156 |
Yes | output | 1 | 1,078 | 1 | 2,157 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,079 | 1 | 2,158 |
No | output | 1 | 1,079 | 1 | 2,159 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,080 | 1 | 2,160 |
No | output | 1 | 1,080 | 1 | 2,161 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,081 | 1 | 2,162 |
No | output | 1 | 1,081 | 1 | 2,163 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There are n + 1 cities, numbered from 0 to n. n roads connect these cities, the i-th road connects cities i - 1 and i (i ∈ [1, n]).
Each road has a direction. The directions are given by a stri... | instruction | 0 | 1,082 | 1 | 2,164 |
No | output | 1 | 1,082 | 1 | 2,165 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's marriage season in Ringland!
Ringland has a form of a circle's boundary of length L. There are n bridegrooms and n brides, and bridegrooms decided to marry brides.
Of course, each bridegr... | instruction | 0 | 1,424 | 1 | 2,848 |
No | output | 1 | 1,424 | 1 | 2,849 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's marriage season in Ringland!
Ringland has a form of a circle's boundary of length L. There are n bridegrooms and n brides, and bridegrooms decided to marry brides.
Of course, each bridegr... | instruction | 0 | 1,425 | 1 | 2,850 |
No | output | 1 | 1,425 | 1 | 2,851 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's marriage season in Ringland!
Ringland has a form of a circle's boundary of length L. There are n bridegrooms and n brides, and bridegrooms decided to marry brides.
Of course, each bridegr... | instruction | 0 | 1,426 | 1 | 2,852 |
No | output | 1 | 1,426 | 1 | 2,853 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's marriage season in Ringland!
Ringland has a form of a circle's boundary of length L. There are n bridegrooms and n brides, and bridegrooms decided to marry brides.
Of course, each bridegr... | instruction | 0 | 1,427 | 1 | 2,854 |
No | output | 1 | 1,427 | 1 | 2,855 |
Provide a correct Python 3 solution for this coding contest problem.
problem
AOR Ika is at the $ S $ th bus stop at time $ 0 $ and wants to go from there to the $ G $ th bus stop. The number of bus stops $ N $ and $ M $ routes (*) connecting different bus stops are given. The bus stops are numbered $ 1, \ dots, and N... | instruction | 0 | 1,634 | 1 | 3,268 |
"Correct Solution:
```
from heapq import heappush, heappop
def main():
n, m, s, g = map(int, input().split())
s -= 1
g -= 1
edges = [[] for _ in range(n)]
for _ in range(m):
u, v, t, c = map(int, input().split())
u -= 1
v -= 1
edges[u].append((t, t + c, v))
score = {}
score[(0, 0)] = 0... | output | 1 | 1,634 | 1 | 3,269 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,742 | 1 | 3,484 |
Tags: dp, greedy
Correct Solution:
```
t = int(input())
for j in range(t):
n, a, b = map(int, input().split())
s = input()
k = 0
z = 0
for i in range(n):
if s[i] == '0':
z += 1
else:
if z == 1:
if i == z:
k += 3 * b + 2 * a
... | output | 1 | 1,742 | 1 | 3,485 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,743 | 1 | 3,486 |
Tags: dp, greedy
Correct Solution:
```
t = int(input())
for _ in range(t):
n,a,b = map(int,input().rstrip().split())
s = input()+'0'
# if a<=b:
# c=0
# for i in s:
# if i=='1'
# c+=1
# break
# else:
# c+=1
m1,m2 = b,... | output | 1 | 1,743 | 1 | 3,487 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,744 | 1 | 3,488 |
Tags: dp, greedy
Correct Solution:
```
C=[]
for _ in range (int(input())):
n,a,b=map(int,input().split())
pre=None
pos=[None,None]
genc=False
x=0
cost=(a+b)*n+b
for i,cur in enumerate(input()):
if pre==None:
pre='0'
continue
if cur=='0':
... | output | 1 | 1,744 | 1 | 3,489 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,745 | 1 | 3,490 |
Tags: dp, greedy
Correct Solution:
```
t = int(input())
for i in range(t):
n,a,b=map(int,input().split())
s=input()
p=[]
p1=0
p2=0
for j in range(n):
if s[j]=='0':
p1+=1
if p2!=0:
p.append(p2)
p2=0
else:
p2+=1
... | output | 1 | 1,745 | 1 | 3,491 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,746 | 1 | 3,492 |
Tags: dp, greedy
Correct Solution:
```
t=int(input())
for it in range(t):
n,a,b=map(int,input().split())
s=input()
dp = [[int(1e18)]*2 for i in range(n+1)]
dp[0][0]=b
for i in range(n):
if(s[i]=='1'):
dp[i+1][1]=min(dp[i+1][1],dp[i][1]+a+2*b)
else:
dp[i+1]... | output | 1 | 1,746 | 1 | 3,493 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,747 | 1 | 3,494 |
Tags: dp, greedy
Correct Solution:
```
t = int(input())
def solve():
n,a,b = map(int,input().split())
dp = [[10**20,10**20] for i in range(n + 1)]
dp[0][0] = b
s = input()
s += '0'
for i in range(1,n + 1):
if s[i] == '1':
dp[i][1] = min(dp[i - 1][0] + 2*a + 2*b, dp[i - 1][1]... | output | 1 | 1,747 | 1 | 3,495 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,748 | 1 | 3,496 |
Tags: dp, greedy
Correct Solution:
```
t = int(input())
for _ in range(t):
n, a, b = map(int, input().split())
s = str(input())
last_seen = "0"
count = 0
counts = []
for i in range(len(s)):
if s[i] == last_seen:
count += 1
else:
counts.append(count)
last_seen = s[i]
count = 1
counts.append(coun... | output | 1 | 1,748 | 1 | 3,497 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity, we'll denote each crossroad as an interval (x,... | instruction | 0 | 1,749 | 1 | 3,498 |
Tags: dp, greedy
Correct Solution:
```
T = int(input())
for _ in range(T):
nab = list(map(int, input().split()))
n, a, b = nab[0], nab[1], nab[2]
s = str(input())
crp = list()
for i in range(n):
if s[i] == '1':
crp.append(i)
min_cost = (n+1)*b + (n*a)
if len(crp) == ... | output | 1 | 1,749 | 1 | 3,499 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,750 | 1 | 3,500 |
Yes | output | 1 | 1,750 | 1 | 3,501 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,751 | 1 | 3,502 |
Yes | output | 1 | 1,751 | 1 | 3,503 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,752 | 1 | 3,504 |
Yes | output | 1 | 1,752 | 1 | 3,505 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,753 | 1 | 3,506 |
Yes | output | 1 | 1,753 | 1 | 3,507 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,754 | 1 | 3,508 |
No | output | 1 | 1,754 | 1 | 3,509 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,755 | 1 | 3,510 |
No | output | 1 | 1,755 | 1 | 3,511 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,756 | 1 | 3,512 |
No | output | 1 | 1,756 | 1 | 3,513 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are responsible for installing a gas pipeline along a road. Let's consider the road (for simplicity) as a segment [0, n] on OX axis. The road can have several crossroads, but for simplicity,... | instruction | 0 | 1,757 | 1 | 3,514 |
No | output | 1 | 1,757 | 1 | 3,515 |
Provide tags and a correct Python 3 solution for this coding contest problem.
The Berland road network consists of n cities and of m bidirectional roads. The cities are numbered from 1 to n, where the main capital city has number n, and the culture capital — number 1. The road network is set up so that it is possible ... | instruction | 0 | 1,904 | 1 | 3,808 |
Tags: dp, graphs, shortest paths
Correct Solution:
```
from collections import deque
def put():
return map(int, input().split())
def bfs(s):
q,dis,cnt = deque(), [-1]*n,[0]*n
q.append(s)
dis[s],cnt[s]=0,1
while q:
x = q.popleft()
for y in graph[x]:
if dis[y]==-1:
... | output | 1 | 1,904 | 1 | 3,809 |
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