#include <bits/stdc++.h>
using namespace std;
int main()
{
    int k,m,n,f,a,b;
    cin>>k>>m>>n;
    for(int i=1;i<=m;i++)
    {
        f=1;
        cin>>a>>b;
        if(b==0) continue;
        else if(a==0) cout<<i<<" ";
        else
        {
            if(k/a*b>=n) cout<<i<<" ";
        }
        if(f==0) cout<<-1;
    }
    if(f==0) cout<<-1;
    return 0;
}