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  1. #include<iostream> 
  2. #include<math.h>
  3. #include<iomanip>
  4. #include <string>
  5. #include<algorithm>
  6.  
  7. using namespace std;
  8.  
  9. void fast()
  10. {
  11.     ios_base::sync_with_stdio(0);
  12.     cin.tie(0);
  13.     cout.tie(0);
  14. }
  15.  
  16. int main()
  17. {
  18.     fast();
  19.     int n,q;
  20.     cin >> n>>q;
  21.     int A[100000];
  22.     for (int i = 0;i < n;i++) {
  23.         cin >> A[i];
  24.     }
  25.     int pre[100000] = {0};
  26.  
  27.     for (int i = 1;i <= n;i++) {
  28.         pre[i] = pre[i - 1] + A[i - 1];
  29.     }
  30.  
  31.         while (q--) {  
  32.         int l, r;
  33.         cin >> l >> r;
  34.  
  35.             cout << pre[r] - pre[l - 1] << endl;
  36.  
  37.     }
  38.  
  39.     return 0;
  40. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/1rlIjl
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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