#include<iostream>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
long long n,q;
cin>>n>>q;
long long d[n+1],c[n+1],r[q],v[q];
d[0]=0;
c[0]=0;
long long pr[n+1];
pr[0]=0;
for(long long i=1;i<=n;i++){
cin>>d[i]>>c[i];
pr[i]=pr[i-1]+c[i];
}
for(long long i=0;i<q;i++){
cin>>r[i]>>v[i];
long long l = r[i];
long long r1 = n;
while(l<r1){
long long mid;
if((l+r1)%2==0) mid = (l+r1)/2;
else mid = (l+r1)/2+1;
if(pr[mid]-pr[r[i]-1]==v[i]){
cout<<mid<<endl;
break;
}
if(pr[mid]-pr[r[i]-1]>v[i]){
r1 = mid;
if(pr[mid-1]-pr[r[i]-1]<=v[i]){
cout<<mid<<endl;
break;
}
}
else{
l = mid;
if(pr[mid+1]-pr[r[i]-1]>v[i]){
cout<<mid+1<<endl;
break;
}
}
}
if(l==r1){
cout<<0<<endl;
}
}
}
