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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4.  
  5.     int n,q; cin>>n>>q;
  6.     int a[n];
  7.     for(int i=0;i<n;i++) cin>>a[i];
  8.  
  9.     int p[n];
  10.     p[0]=a[0];
  11.  
  12.     for(int i=1;i<n;i++)
  13.         p[i]=p[i-1]+a[i];
  14.  
  15.     while(q--){
  16.         int l,r; cin>>l>>r;
  17.  
  18.         if(l==0) cout<<p[r]<<endl;
  19.         else cout<<p[r]-p[l-1]<<endl;
  20.     }
  21. }
Success #stdin #stdout 0.01s 5320KB
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stdin
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5 4
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0 2
1 4
2 2
3 4
stdout
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60
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90
https://ideone.com/OcY1AK
9
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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