message stringlengths 2 44.5k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 42 109k | cluster float64 5 5 | __index_level_0__ int64 84 217k |
|---|---|---|---|---|---|
Provide a correct Python 3 solution for this coding contest problem.
Example
Input
7
>>
Output
7 | instruction | 0 | 2,431 | 5 | 4,862 |
"Correct Solution:
```
n=int(input())
s=input()
print(n-min(s.find('>'),n-s.rfind('<')-1))
``` | output | 1 | 2,431 | 5 | 4,863 |
Provide a correct Python 3 solution for this coding contest problem.
There are $ n $ acitivities with start times $ \\ {s_i \\} $ and finish times $ \\ {t_i \\} $. Assuming that a person can only work on a single activity at a time, find the maximum number of activities that can be performed by a single person.
Const... | instruction | 0 | 2,437 | 5 | 4,874 |
"Correct Solution:
```
n = (int)(input())
list=[]
for i in range(n):
k = input().split(" ")
a=(int)(k[0])
b=(int)(k[1])
list.append([a,b])
list = sorted(list,key=lambda x: x[1])
count=0
time=0
for i in range(n):
if(time<list[i][0]):
count+=1
time=list[i][1]
print(count)
``` | output | 1 | 2,437 | 5 | 4,875 |
Provide a correct Python 3 solution for this coding contest problem.
There are $ n $ acitivities with start times $ \\ {s_i \\} $ and finish times $ \\ {t_i \\} $. Assuming that a person can only work on a single activity at a time, find the maximum number of activities that can be performed by a single person.
Const... | instruction | 0 | 2,441 | 5 | 4,882 |
"Correct Solution:
```
def act(st):
st.sort(key = lambda x:x[0])
OP = [st[0]]
for i in range(1,len(st)):
if OP[len(OP)-1][1] < st[i][0]:
OP.append(st[i])
elif OP[len(OP)-1][1] <= st[i][1]:
pass
else:
OP.pop()
OP.append(st[i])
retur... | output | 1 | 2,441 | 5 | 4,883 |
Provide a correct Python 3 solution for this coding contest problem.
There are $ n $ acitivities with start times $ \\ {s_i \\} $ and finish times $ \\ {t_i \\} $. Assuming that a person can only work on a single activity at a time, find the maximum number of activities that can be performed by a single person.
Const... | instruction | 0 | 2,442 | 5 | 4,884 |
"Correct Solution:
```
n = int(input())
A = []
for i in range(n):
s, t = [int(x) for x in input().split()]
A.append((s, t))
A.sort(key=lambda x: x[1])
ans = 0
t = -1
for a in A:
if a[0] > t:
ans += 1
t = a[1]
print(ans)
``` | output | 1 | 2,442 | 5 | 4,885 |
Provide a correct Python 3 solution for this coding contest problem.
There are $ n $ acitivities with start times $ \\ {s_i \\} $ and finish times $ \\ {t_i \\} $. Assuming that a person can only work on a single activity at a time, find the maximum number of activities that can be performed by a single person.
Const... | instruction | 0 | 2,443 | 5 | 4,886 |
"Correct Solution:
```
n = int(input())
t_s = []
for i in range(n):
a , b = map(int, input().split())
t_s += [(b, a)]
t_s.sort()
Sum = 1
i = 1
t_now = t_s[0][0]
while i <= n-1:
for a in t_s[i:]:
i = i + 1
if t_now < a[1]:
Sum += 1
t_now = a[0]
print(Sum)
... | output | 1 | 2,443 | 5 | 4,887 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,451 | 5 | 4,902 |
"Correct Solution:
```
while True:
a=input()
if a.find('?')>0:break
t=a.split()
if t[1]=='/':print(int(t[0])//int(t[2]))
else:print(eval(''.join(t)))
``` | output | 1 | 2,451 | 5 | 4,903 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,452 | 5 | 4,904 |
"Correct Solution:
```
while True:
i = input()
if "?" in i:
break
print(int(eval(i)))
``` | output | 1 | 2,452 | 5 | 4,905 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,453 | 5 | 4,906 |
"Correct Solution:
```
while True:
s=input()
if "?" in s:
break
print(int(eval(s)))
``` | output | 1 | 2,453 | 5 | 4,907 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,454 | 5 | 4,908 |
"Correct Solution:
```
while(True):
a,op,b=input().split()
if op == '?':
break
print(int(eval(a+op+b)))
``` | output | 1 | 2,454 | 5 | 4,909 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,455 | 5 | 4,910 |
"Correct Solution:
```
import re
while True:
s = input()
if (re.match(r'.+\s\?\s.+', s)):
break
print(int(eval(s)))
``` | output | 1 | 2,455 | 5 | 4,911 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,456 | 5 | 4,912 |
"Correct Solution:
```
ops = {'+': lambda a, b: a+b, '-': lambda a, b: a-b, '*': lambda a, b: a*b, '/': lambda a, b: int(a/b)}
while True:
a, op, b = input().split()
if op not in ops.keys():
break
print(ops[op](int(a),int(b)))
``` | output | 1 | 2,456 | 5 | 4,913 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,457 | 5 | 4,914 |
"Correct Solution:
```
while 1:
a=input()
if '?' in a:break
print(int(eval(a)))
``` | output | 1 | 2,457 | 5 | 4,915 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.
Constraints
* ... | instruction | 0 | 2,458 | 5 | 4,916 |
"Correct Solution:
```
while True:
a,op,b = map(str,input().split())
if op == "?":
exit ()
else:
if op == "/":
print (int(a)//int(b))
else:
print (eval(a+op+b))
``` | output | 1 | 2,458 | 5 | 4,917 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,459 | 5 | 4,918 |
Yes | output | 1 | 2,459 | 5 | 4,919 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,460 | 5 | 4,920 |
Yes | output | 1 | 2,460 | 5 | 4,921 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,461 | 5 | 4,922 |
Yes | output | 1 | 2,461 | 5 | 4,923 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,462 | 5 | 4,924 |
Yes | output | 1 | 2,462 | 5 | 4,925 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,463 | 5 | 4,926 |
No | output | 1 | 2,463 | 5 | 4,927 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,464 | 5 | 4,928 |
No | output | 1 | 2,464 | 5 | 4,929 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,465 | 5 | 4,930 |
No | output | 1 | 2,465 | 5 | 4,931 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.
The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The divisi... | instruction | 0 | 2,466 | 5 | 4,932 |
No | output | 1 | 2,466 | 5 | 4,933 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's write all the positive integer numbers one after another from 1 without any delimiters (i.e. as a single string). It will be the infinite sequence starting with 123456789101112131415161718... | instruction | 0 | 2,538 | 5 | 5,076 |
No | output | 1 | 2,538 | 5 | 5,077 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is the easy version of the problem. The only difference is that in this version k = 0.
There is an array a_1, a_2, …, a_n of n positive integers. You should divide it into a minimal number... | instruction | 0 | 2,664 | 5 | 5,328 |
Yes | output | 1 | 2,664 | 5 | 5,329 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given n integers a1, a2, ..., an.
A sequence of integers x1, x2, ..., xk is called a "xor-sequence" if for every 1 ≤ i ≤ k - 1 the number of ones in the binary representation of the num... | instruction | 0 | 2,952 | 5 | 5,904 |
No | output | 1 | 2,952 | 5 | 5,905 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given n integers a1, a2, ..., an.
A sequence of integers x1, x2, ..., xk is called a "xor-sequence" if for every 1 ≤ i ≤ k - 1 the number of ones in the binary representation of the num... | instruction | 0 | 2,953 | 5 | 5,906 |
No | output | 1 | 2,953 | 5 | 5,907 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given n integers a1, a2, ..., an.
A sequence of integers x1, x2, ..., xk is called a "xor-sequence" if for every 1 ≤ i ≤ k - 1 the number of ones in the binary representation of the num... | instruction | 0 | 2,954 | 5 | 5,908 |
No | output | 1 | 2,954 | 5 | 5,909 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given n integers a1, a2, ..., an.
A sequence of integers x1, x2, ..., xk is called a "xor-sequence" if for every 1 ≤ i ≤ k - 1 the number of ones in the binary representation of the num... | instruction | 0 | 2,955 | 5 | 5,910 |
No | output | 1 | 2,955 | 5 | 5,911 |
Provide tags and a correct Python 3 solution for this coding contest problem.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA" WITHOUT A MAGIC AND WON'T DO YOU ANY GOOD
TH... | instruction | 0 | 2,990 | 5 | 5,980 |
Tags: *special, implementation
Correct Solution:
```
input()
arr = list(map(int, input().split()))
print(max(arr) ^ arr[-1])
``` | output | 1 | 2,990 | 5 | 5,981 |
Provide tags and a correct Python 3 solution for this coding contest problem.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA" WITHOUT A MAGIC AND WON'T DO YOU ANY GOOD
TH... | instruction | 0 | 2,992 | 5 | 5,984 |
Tags: *special, implementation
Correct Solution:
```
n = int(input())
#n, m = map(int, input().split())
#s = input()
c = list(map(int, input().split()))
print(max(c) ^ c[-1])
``` | output | 1 | 2,992 | 5 | 5,985 |
Provide tags and a correct Python 3 solution for this coding contest problem.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA" WITHOUT A MAGIC AND WON'T DO YOU ANY GOOD
TH... | instruction | 0 | 2,994 | 5 | 5,988 |
Tags: *special, implementation
Correct Solution:
```
N = int( input() )
A = list( map( int, input().split() ) )
print( max( A ) ^ A[ N - 1 ] )
``` | output | 1 | 2,994 | 5 | 5,989 |
Provide tags and a correct Python 3 solution for this coding contest problem.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA" WITHOUT A MAGIC AND WON'T DO YOU ANY GOOD
TH... | instruction | 0 | 2,995 | 5 | 5,990 |
Tags: *special, implementation
Correct Solution:
```
input()
a = list(map(int, input().split()))
print(max(a) ^ a[-1])
``` | output | 1 | 2,995 | 5 | 5,991 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 2,996 | 5 | 5,992 |
Yes | output | 1 | 2,996 | 5 | 5,993 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 2,997 | 5 | 5,994 |
Yes | output | 1 | 2,997 | 5 | 5,995 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 2,998 | 5 | 5,996 |
Yes | output | 1 | 2,998 | 5 | 5,997 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 2,999 | 5 | 5,998 |
Yes | output | 1 | 2,999 | 5 | 5,999 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 3,000 | 5 | 6,000 |
No | output | 1 | 3,000 | 5 | 6,001 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 3,001 | 5 | 6,002 |
No | output | 1 | 3,001 | 5 | 6,003 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 3,002 | 5 | 6,004 |
No | output | 1 | 3,002 | 5 | 6,005 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT BASE AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA... | instruction | 0 | 3,003 | 5 | 6,006 |
No | output | 1 | 3,003 | 5 | 6,007 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,069 | 5 | 6,138 |
Yes | output | 1 | 3,069 | 5 | 6,139 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,070 | 5 | 6,140 |
Yes | output | 1 | 3,070 | 5 | 6,141 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,071 | 5 | 6,142 |
Yes | output | 1 | 3,071 | 5 | 6,143 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,072 | 5 | 6,144 |
No | output | 1 | 3,072 | 5 | 6,145 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,073 | 5 | 6,146 |
No | output | 1 | 3,073 | 5 | 6,147 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,074 | 5 | 6,148 |
No | output | 1 | 3,074 | 5 | 6,149 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a sequence of integers of length n and integer number k. You should print any integer number x in the range of [1; 10^9] (i.e. 1 ≤ x ≤ 10^9) such that exactly k elements of given s... | instruction | 0 | 3,075 | 5 | 6,150 |
No | output | 1 | 3,075 | 5 | 6,151 |
Provide a correct Python 3 solution for this coding contest problem.
There is an integer sequence A of length N whose values are unknown.
Given is an integer sequence B of length N-1 which is known to satisfy the following:
B_i \geq \max(A_i, A_{i+1})
Find the maximum possible sum of the elements of A.
Constraints... | instruction | 0 | 3,118 | 5 | 6,236 |
"Correct Solution:
```
n = int(input())
b = [int(i) for i in input().split()]
a = [min(b[i], b[i + 1]) for i in range(n - 2)]
print(sum(a) + b[0] + b[-1])
``` | output | 1 | 3,118 | 5 | 6,237 |
Provide a correct Python 3 solution for this coding contest problem.
There is an integer sequence A of length N whose values are unknown.
Given is an integer sequence B of length N-1 which is known to satisfy the following:
B_i \geq \max(A_i, A_{i+1})
Find the maximum possible sum of the elements of A.
Constraints... | instruction | 0 | 3,119 | 5 | 6,238 |
"Correct Solution:
```
N=int(input())
*B, = map(int,input().split())
ans = B[0] + B[-1] + sum(min(b0,b1) for b0,b1 in zip(B[:-1],B[1:]))
print(ans)
``` | output | 1 | 3,119 | 5 | 6,239 |
Provide a correct Python 3 solution for this coding contest problem.
There is an integer sequence A of length N whose values are unknown.
Given is an integer sequence B of length N-1 which is known to satisfy the following:
B_i \geq \max(A_i, A_{i+1})
Find the maximum possible sum of the elements of A.
Constraints... | instruction | 0 | 3,120 | 5 | 6,240 |
"Correct Solution:
```
input()
b = list(map(int, input().split()))
print(sum(map(min, [b[0]] + b, b + [b[-1]])))
``` | output | 1 | 3,120 | 5 | 6,241 |
Provide a correct Python 3 solution for this coding contest problem.
There is an integer sequence A of length N whose values are unknown.
Given is an integer sequence B of length N-1 which is known to satisfy the following:
B_i \geq \max(A_i, A_{i+1})
Find the maximum possible sum of the elements of A.
Constraints... | instruction | 0 | 3,121 | 5 | 6,242 |
"Correct Solution:
```
N=int(input())
S=list(map(int,input().split()))
ans=0
ans+=S[0]
for i in range(N-2):
ans+=min(S[i],S[i+1])
ans+=S[-1]
print(ans)
``` | output | 1 | 3,121 | 5 | 6,243 |
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