12022 - prefix sum

#include <stdio.h>

long long int arr[1000005];
long long int sum[1000005];
int main(){

    int length;
    int left, right;
    scanf("%d", &length);
    for(int i = 1; i <= length; i++){
        scanf("%lld", &arr[i]);
        sum[i] = sum[i- 1] + arr[i];
    }

    long long int ans = 0;
    int query;
    scanf("%d", &query);
    while (query--){
        scanf("%d %d", &left, &right);
        for (int i = 1; i <= length; i++){
            ans = sum[right] - sum[left - 1];
        }
        printf("%lld\n", ans);
    }
    return 0;
}