#include <bits/stdc++.h>
using namespace std;
const int MAXN = 4e5 + 25;
typedef long long ll;
int p[MAXN];
int n; pair <ll, int> d2[MAXN];
int ans[MAXN];
int main () {
ios::sync_with_stdio(0); cin.tie(0);
cin >> n;
for (int i = 0; i <= n + 1; i++) p[i] = n + 1;
ll cur = 0; d2[0] = {0, 0};
for (int i = 1; i <= n; i++) {
ll x; cin >> x; cur += x; d2[i] = {cur, i};
}
sort(d2, d2 + n + 1);
for (int i = 0; i < n; i++) {
if (d2[i].first == d2[i + 1].first) {
p[d2[i].second] = d2[i + 1].second;
}
}
for (int i = n; i >= 0; i--) {
p[i] = min(p[i], p[i + 1]);
}
int q; cin >> q;
while (q--) {
int l, r; cin >> l >> r;
l--;
int ans = 0;
while (p[l] <= r) {
l = p[l]; ans++;
}
cout << ans << '\n';
}
}
