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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int maxn = 1e5 + 5;
  4. int n, q;
  5. int a[maxn], pre[maxn];
  6.  
  7.  
  8. int main(){
  9.     cin >> n >> q;
  10.     for (int i = 1; i <= n; i++) {
  11.         cin >> a[i];
  12.     }
  13.  
  14.     for (int i = 1; i <= n ; ++i) {
  15.         pre[i] = pre[i-1] + a[i];
  16.     }
  17.  
  18.  
  19.     for (int i = 1; i <= q ; ++i) {
  20.         int l, r; cin >> l >> r;
  21.         cout << pre[r] - pre[l-1] << '\n';
  22.     }
  23.  
  24.  
  25.     return 0;
  26. }
  27.  
Success #stdin #stdout 0.01s 5328KB
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stdout
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https://ideone.com/kfUrUP
language:
C++14 (clang 8.0)
created:
13 hours ago
visibility:
public

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