#include<bits/stdc++.h>
#define LL long long
using namespace std;
const int N = 4e5 + 1;
int ans[N] , lst[N] , e[N], l[N], r[N];
unordered_map<LL , int> nt;
int main(){
cin.tie(0)->sync_with_stdio(0);
int n;
cin >> n;
LL sum = 0;
nt[0] = 0;
lst[0] = -1;
int t = -1;
for(int i = 1;i <= n; i++){
cin >> ans[i];
sum += ans[i];
if(nt.find(sum) != nt.end())
t = max(t,nt[sum]);
lst[i] = t;
nt[sum] = i;
}
int q;
cin >> q;
for(int i = 0;i < q;i ++){
cin >> l[i] >> r[i];
ans[i] = 0;
}
for(int bit = 18;bit >= 0;bit --){
for(int i = 0;i <= n;i ++){
e[i] = lst[i];
}
for(int c = 0;c < bit;c ++){
for(int i = n;i >= 0;i --){
e[i] = (e[i] > -1 ? e[e[i]] : -1);
}
}
for(int i = 0;i < q;i ++){
if(e[r[i]] >= l[i] - 1){
ans[i] += 1 << bit;
r[i] = e[r[i]];
}
}
}
for(int i = 0;i < q;i ++){
cout << ans[i] << endl;
}
}
