Envío 2226

Código

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int cases, x, sum = 0;
    cin >> cases;
    vector <int> numbers;
    vector <int> sum_num;
    while( cases-- ){
        cin >> x;
        numbers.push_back(x);
        sum += x;
        sum_num.push_back(sum);
    }

    int consulta,a,b,ans;
    cin >> consulta;
    while( consulta-- ){
        cin >> a >> b;
        ans = sum_num[b];
        if(a > 0){
            ans -= sum_num[a-1];
        }
        cout << ans << endl;
    }
    return 0;
}