#include<bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define pb push_back
#define ii pair<int, int>
#define sz(v) (int)v.size()
#define all(v) v.begin(), v.end()
using namespace std;
const int N=4e5+5, mod = 1e9+7, inf = 1e18, L = 19;
int n, q;
int a[N], p[N][L];
map<int, int> mp;
signed main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n;
for (int i=1; i<=n; i++) {
cin >> a[i];
a[i] += a[i-1];
}
p[n+1][0] = n+1;
for (int i=n; i>=1; i--) {
p[i][0] = (mp[a[i-1]] ? mp[a[i-1]]+1 : n+1);
p[i][0] = min(p[i][0], p[i+1][0]);
mp[a[i-1]] = i-1;
}
for (int j=1; j<L; j++) {
for (int i=1; i<=n+1; i++) {
p[i][j] = p[p[i][j-1]][j-1];
}
}
cin >> q;
while(q--) {
int l, r; cin >> l >> r;
int ans = 0;
for (int i=L-1; i>=0; i--) {
if(p[l][i]<=r) {
l = p[l][i];
ans += (1<<i);
//cout << l << " " << ans << '\n';
}
}
cout << ans+(p[l][0]-1<=r) << '\n';
}
}
