#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
long long n,q,val,pos,currd;
long long d[100005],v[100005],nextx[100005];
vector<int> vv;
stack<int> st;
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 = n ; i>=1 ; i--){
while(st.size()>0 && d[st.top()]<d[i]){
st.pop();
}
if(st.size()==0)nextx[i] = 0;
else nextx[i] = st.top();
st.push(i);
}
for(int i = 1 ; i<=q ; i++){
cin>>pos>>val;
currd = 0;
int j = pos;
while(j<=n){
if(d[j]>currd){
currd = d[j];
val-=v[j];
if(val<=0){cout<<j<<endl;break;}
}
j = nextx[j];
if(j==0){cout<<0<<endl;val = 0;break;}
}
if(val>0)cout<<0<<endl;
}
return 0;
}
