#include<bits/stdc++.h> using namespace std; int x,y,k,ai,xi,bi,yi,t,flag; int main(){ cin>>x>>y>>k; if(x==y){ cout<<t; return 0; } for(int i=1;i<=k;i++){ if(i==1) t=1; cin>>ai>>xi>>bi>>yi; if(ai==1) x+=xi; if(ai==-1) x-=xi; if(bi==1) y+=yi; if(bi==-1) y-=yi; if(x<=0) x=0; if(y<=0) y=0; if(x==y){ cout<<t; return 0; } else t++; } cout<<-1; return 0; }