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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n;
  6.     cin >> n;
  7.  
  8.     vector<int> arr(n), dp(n);
  9.     int k;
  10.     cin >> k;
  11.  
  12.     for (int i = 0; i < n; i++) {
  13.         cin>>arr[i];
  14.         if(i==0){
  15.             dp[i]=arr[i];
  16.         }else{
  17.             dp[i]=dp[i-1]+arr[i];
  18.         }
  19.     }
  20.  
  21.     cout << dp[k - 1];
  22.     return 0;
  23. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/55l54b
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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