#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = 4e5+5;
int up[N][20];
int idx[N];
// for(int i=1; i<=n; i++)
void solve(){
int n; cin >> n;
for(int i=0; i<=n; i++) idx[i] = 1e9;
unordered_map<int,int> last;
last.reserve(n);
last.max_load_factor(0.7);
int pre = 0;
for(int i=0; i<=n; i++) {
if(i) {int x; cin >> x; pre += x; }
if(last.count(pre)) up[i][0] = last[pre];
else up[i][0] = -1;
last[pre] = i;
if(up[i][0] != -1) idx[up[i][0]] = min(idx[up[i][0]], i);
}
last.clear();
int mn = 1e9;
for(int i=n; i>=0; i--){
if(idx[i] != 1e9) mn = min(mn, idx[i]);
if(mn == 1e9) up[i][0] = n+1;
else up[i][0] = mn;
for(int k=1; k<20; k++) {
if (up[i][k-1] > n) up[i][k] = n + 1;
else up[i][k] = up[up[i][k-1]][k-1];
}
}
int q; cin >> q;
while(q--){
int l, r; cin >> l >> r; l--;
int ans = 0;
for(int b=19; b>=0; b--){
if(up[l][b] > r) continue;
ans += 1<<b;
l = up[l][b];
}
cout << ans << '\n';
}
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
solve();
}
