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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define int long long 
  5.  
  6. const int N = 1e5 + 5;
  7. int n , q;
  8. int a[N] , pre[N];
  9.  
  10. main()
  11. {
  12.     ios::sync_with_stdio(0);
  13.     cin.tie(0);
  14.     cin >> n;
  15.     for(int i = 1 ; i <= n ; i++)
  16.         cin >> a[i];
  17.  
  18.     for(int i = 1 ; i <= n ; i++)
  19.         pre[i] = pre[i - 1] + a[i];
  20.  
  21.     /// pre[5] -> a[1] + a[2] + a[3] + a[4] + a[5]
  22.  
  23.     cin >> q;
  24.  
  25.     for(int i = 1 ; i <= q ; i++)
  26.     {
  27.         int l , r;
  28.         cin >> l >> r;
  29.         cout << pre[r] - pre[l - 1] << "\n";
  30.     }
  31. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/NpqzLT
language:
C++14 (gcc 8.3)
created:
18 hours ago
visibility:
public

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