#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define mp make_pair
#define pb push_back
using namespace std;
int n, q;
vector<pii> arr;
int parent[100000], water[100000];
int main(){
cin>>n>>q;
for(int i = 0; i < n; i++){
int a, b;
cin>>a>>b;
arr.pb(mp(a,b));
water[i] = b;
}
for(int i = 0; i < n; i++){
bool f = false;
for(int j = i + 1; j < n; j++){
if(arr[i].first < arr[j].first)
{
f = true;
parent[i] = j;
break;
}
else
continue;
}
if(!f)
parent[i] = n;
cout<<"the parent of "<<i<<" is "<<parent[i]<<endl;
}
while(q--){
int at, vol;
cin>>at>>vol;
at--;
if(vol <= water[at])
{
cout<<at + 1<<endl;
continue;
}
while(vol > 0){
if(at == n){
cout<<0<<endl;
break;
}
if(vol - water[at] <= 0){
cout<<at + 1<<endl;
break;
}
vol -= water[at];
at = parent[at];
}
}
}
