# include <iostream>
using namespace std;
const int MAX=3e3+11;
int n,q;
pair<int,int> a[MAX];
int dp[MAX][MAX];
int rec(int l, int r)
{
if(l==1 and r==n) return 0;
if(dp[l][r]!=0) return dp[l][r];
int ans=1e9;
for(int i=l;i<=r;i++)
{
int l2=min(a[i].first,l);
int r2=max(a[i].second,r);
if(!(l2==l and r2==r)) ans=min(ans,rec(l2,r2)+1);
}
dp[l][r]=ans;
return ans;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin>>n;
for(int i=1;i<=n;i++) cin>>a[i].first>>a[i].second;
cin>>q;
while(q--)
{
int pos;
cin>>pos;
int ans=rec(a[pos].first,a[pos].second);
if(ans==1e9) cout<<-1<<"\n";
else cout<<ans+1<<"\n";
}
return 0;
}
