1848A - Vika and Her Friends - CodeForces Solution

#include<bits/stdc++.h>
using namespace std;
int  main(){
    int t;cin>>t;
    while(t--){
        int n,m,k;cin>>n>>m>>k;
        int x,y;cin>>x>>y;
        int c=0;
        while(k--){
            int x1,y1;
            cin>>x1>>y1;
            if((abs(x1-x)+abs(y1-y))%2==0){
                c=1;
            }
        }
        if(c==0){
            cout<<"YES\n";
        }else{
            cout<<"NO\n";
        }
    }
}