#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<int> c(n);
for (int i = 0; i < n; i++) {
cin >> c[i];
}
vector<int> R(n);
map<long long, int> mp;
long long s = 0;
mp[0] = n;
for (int i = n - 1; i >= 0; i--) {
s += c[i];
if (mp.count(s)) {
R[i] = mp[s] - 1;
} else {
R[i] = n;
}
mp[s] = i;
if (i + 1 < n) {
R[i] = min(R[i], R[i + 1]);
}
}
const int L = 25;
vector<vector<int>> pos(n, vector<int>(L));
for (int i = 0; i < n; i++) {
pos[i][0] = R[i];
}
for (int j = 1; j < L; j++) {
for (int i = 0; i < n; i++) {
if (pos[i][j - 1] + 1 < n) {
pos[i][j] = pos[pos[i][j - 1] + 1][j - 1];
} else {
pos[i][j] = n;
}
}
}
int q;
cin >> q;
while (q--) {
int l, r;
cin >> l >> r;
--l; --r;
int ans = 0;
for (int i = L - 1; i >= 0; i--) {
if (l < n &&
pos[l][i] <= r) {
ans += (1 << i);
l = pos[l][i] + 1;
}
}
cout << ans << '\n';
}
return 0;
}
