Envío 756

Código

#include <iostream>
#include <vector>

using namespace std;

#define ll long long
#define D(x) cout << #x << " " << x << endl

int main() {
	ll n, q, ai, x, y;
	cin >> n;
	vector<ll> dp(n + 1);
	dp[0] = 0LL;
	cin >> dp[1];
	for(int i = 2; i <= n; ++i) {
		cin >> ai;
		dp[i] = dp[i - 1] + ai;
	}
	cin >> q;
	while(q--) {
		cin >> x >> y;
		cout << dp[y + 1] - dp[x] << endl;
	}
	return 0;
}