fork download
copy 
  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. int main() {
  6.     int n;
  7.     cin >> n;
  8.  
  9.     vector<int>arr(n);
  10.     for(int i=0;i<n;i++){
  11.     	cin>>arr[i];
  12.     }
  13.  
  14.  
  15.     vector<long long>prefix(n);
  16.     prefix[0]=arr[0];
  17.     for(int i=1;i<n;i++){
  18.        prefix[i]=prefix[i-1]+arr[i];
  19.     }
  20.  
  21.     int q;
  22.     cin >> q;
  23.     while (q--) {
  24.         int i, j;
  25.         cin >> i >> j;
  26.         if (i > j) swap(i, j);
  27.         long long sum = (i == 0) ? prefix[j] : prefix[j] - prefix[i - 1];
  28.         cout << sum << '\n';
  29.     }
  30.  
  31.     return 0;
  32. }
  33.  
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/N3iOU8
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!