Envío 2628

Código

/// Write by Daniel Perez .PERAPRO
#include<bits/stdc++.h>

using namespace std;
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using vi=vector<int>;
#define pb push_back
typedef long long ll;



int main(){
	fast_io;
	int n;
	cin>>n;
	vi v(n);
	for(int i=0;i<n;i++){
	    cin>>v[i];
	}
	vi aux(n+1);
	for(int i=1;i<n+1;i++){
	    aux[i]=aux[i-1]+v[i-1];
	}
	//for(auto x:aux) cout<<" "<<x;
	//cout<<endl;
	int q;
	cin>>q;
	for(int i=0;i<q;i++){
	    int a,b;
	    cin>>a>>b;
	    cout<<aux[b+1]-aux[a]<<endl;
	}
}