#include <bits/stdc++.h>
using namespace std;
const int maxn = 400005;
long long v[maxn];
int nxt[maxn], jump[maxn], lvl[maxn];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;
cin>>n;
v[0] = 0;
for(int i = 1; i <= n; i++) cin>>v[i];
for(int i = 1; i <= n; i++) v[i] += v[i-1];
unordered_map<long long, int> mp;
nxt[n+1] = n+1;
int last = n+1;
for(int i = n; i >= 0; i--){
nxt[i] = mp.count(v[i]) ? mp[v[i]] : n+1;
mp[v[i]] = i;
if(nxt[i] < last){
last = nxt[i];
} else{
nxt[i] = last;
}
}
mp.clear();
jump[n+1] = n+1;
lvl[n+1] = 0;
for(int i = n; i >= 0; i--){
int x = nxt[i];
if(lvl[x] == lvl[jump[x]]){
lvl[i] = lvl[x]+1;
jump[i] = jump[jump[x]];
} else {
lvl[i] = 1;
jump[i] = nxt[i];
}
}
int q;
cin>>q;
while(q--){
int l, r;
cin>>l>>r;
--l;
int ans = 0;
while(nxt[l] <= r) {
if(jump[l] <= r){
ans += (1<<lvl[l]) - 1;
l = jump[l];
} else{
ans++;
l = nxt[l];
}
}
cout << ans << '\n';
}
return 0;
}
