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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     // ????????? ??????????? ????? ? ??????
  8.     ios_base::sync_with_stdio(false);
  9.     cin.tie(NULL);
  10.  
  11.     int n;
  12.     if (!(cin >> n)) return 0;
  13.  
  14.     // ????????? long long ?? ???? ?? ????? ??????, ???? ?? ???? ??????? ????
  15.     vector<long long> prefix_sum(n);
  16.     long long current_sum = 0;
  17.  
  18.     for (int i = 0; i < n; i++) {
  19.         int earning;
  20.         cin >> earning;
  21.         current_sum += earning;
  22.         prefix_sum[i] = current_sum;
  23.     }
  24.  
  25.     int m;
  26.     cin >> m;
  27.     while (m--) {
  28.         int a, b;
  29.         cin >> a >> b;
  30.  
  31.         if (a == 0) {
  32.             cout << prefix_sum[b] << "\n";
  33.         } else {
  34.             cout << prefix_sum[b] - prefix_sum[a - 1] << "\n";
  35.         }
  36.     }
  37.  
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/zcnKKQ
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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