Problema 3

#include <iostream>

using namespace  std;

int sum (int v[], int k) {
    int s = 0;
    for (int i = 1; i <= k; i ++)
        s += v[i];
    return s;
}

int main() {
    int n, m, v[51];
    // 1 < n < m < 50
    for (int i = 1; i <= 10; i ++)
        cin >> v[i];
    cin >> n >> m;
    int s = 0;
    s = sum(v, m);
    s = s - sum(v, n - 1);
    cout << s ;
    return 0;
}