#include<bits/stdc++.h>
//#include "insects.h"
#define f first
#define s second
#define pb push_back
#define pii pair<int,int>
#define ll long long
using namespace std;
const int N=4e5+5;
int pr[N][20]{0};
unordered_map<ll,int>dp;
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);
int n;cin>>n;int a[n+1];
for(int i=1;i<=n;i++)cin>>a[i];
int sum=0;for(int i=0;i<=n+1;i++)pr[i][0]=i;
int id=0;
dp[0]=0;
for(int i=1;i<=n;i++){
sum+=a[i];
if(dp.find(sum)!=dp.end()){
while(id<=dp[sum]){
pr[id++][0]=i;
}dp[sum]=0;
}dp[sum]=i;
}pr[n][0]=n+1;
for(int j=1;j<20;j++)for(int i=0;i<=n+1;i++)pr[i][j]=pr[pr[i][j-1]][j-1];
int q;cin>>q;
while(q--){
int st,ed;cin>>st>>ed;st--;
int l=0,r=n;
while(l<r){
int m=(l+r)>>1;
int x=m;int i=0;
int cur=st;
while(x>0){
if(x&1)cur=pr[cur][i];
i++;x>>=1;
}
if(cur>ed)r=m;
else l=m+1;
}int cur=0;int i=0,x=l;
while(x>0){
if(x&1)cur=pr[cur][i];
i++;x>>=1;
}cout<<l-1<<"\n";
}
}
