#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
long long n,q,val,pos,currd;
long long d[100005],v[100005];
int main() {
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>q;
for(int i = 1 ; i<=n ; i++){
cin>>d[i]>>v[i];
}
for(int i = 1 ; i<=q ; i++){
cin>>pos>>val;
currd = 0;
for(int j = pos ; j<=n ; j++){
if(d[j]>currd){
currd = d[j];
val-=v[j];
if(val<=0){cout<<j<<endl;break;}
}
}
if(val>0)cout<<0<<endl;
}
return 0;
}
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