#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
using ll = long long;
ll n,q,i,r[100007],v[100007],id,v1,res,cur;
int main() {
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>q;
for (i=1;i<=n;i++) cin>>r[i]>>v[i];
while (q--) {
cin>>id>>v1;
if (id>n) {cout<<0<<endl;continue;}
res = v1;
cur = id;
res-=v[id];
for (i=id+1;i<=n;i++) {
if (res<=0) break;
if (r[i]>=r[cur]) {
res-=v[i];
cur = i;
}
}
if (res>0) cout<<0<<endl;
else
cout<<cur<<endl;
}
return 0;
}
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