#include<bits/stdc++.h>
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxn=4e5+100;
const ll inf=1e18;
const ll mod=1e9+7;
ll n,a[maxn];
map<ll,ll>mp;
int nxt[maxn],mn[maxn],p[maxn][19];
void solve()
{
cin >> n;
for(int i=1;i<=n;i++) cin >> a[i],a[i]+=a[i-1];
mp[a[n]]=n;
for(int i=n-1;i>=0;i--)
{
if(mp[a[i]]==0)
{
nxt[i+1]=n+1;
}
else
{
nxt[i+1]=mp[a[i]];
}
mp[a[i]]=i;
}
nxt[n+1]=n+1;
mn[n+1]=n+1;
for(int i=n;i>=1;i--)
{
if(nxt[i]<nxt[mn[i+1]]) mn[i]=i;
else mn[i]=mn[i+1];
}
for(int i=n;i>=1;i--)
{
ll u=nxt[i];
if(u==n+1)
{
p[i][0]=n+1;
}
else
{
u++;
p[i][0]=mn[u];
}
}
p[n+1][0]=n+1;
for(int j=1;j<=18;j++)
{
for(int i=1;i<=n+1;i++)
{
p[i][j]=p[p[i][j-1]][j-1];
}
}
ll q;
cin >> q;
for(int i=1;i<=q;i++)
{
ll l,r,ans=0;
cin >> l >> r;
l=mn[l];
if(nxt[l]>r) {cout << 0 << '\n';continue;}
else ans++;
for(int j=18;j>=0;j--)
{
if(nxt[p[l][j]]<=r) l=p[l][j],ans+=1<<j;
}
cout << ans << '\n';
}
}
int main()
{
fastio
//freopen(TASKNAME".INP","r",stdin);
//freopen(TASKNAME".OUT","w",stdout);
solve();
}
