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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int n, a[100005];
  6.  
  7.  
  8. int main() {
  9.     cin >> n;
  10.     for (int i = 0; i <= n - 1; i++)
  11.         cin >> a[i];
  12.     long long Ans = 0;
  13.     for (int i = 0; i <= n - 1; i++)
  14.         if (i % 2 == 1)
  15.             Ans += a[i];
  16.  
  17.     cout << Ans;
  18.  
  19. }
  20.  
Success #stdin #stdout 0s 5276KB
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https://ideone.com/64DSPP
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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