CodeForces-1058B B. Vasya and Cornfield

这题，我真的不知道题解是啥，自己看代码吧。

#include<iostream>
using namespace std;
int main()
{int n, d,m,i,x,y;cin>>n>>d>>m;for(i=1;i<=m;i++){cin>>x>>y;if(x+y-d>=0&&x+y+d-2*n<=0&&x-y-d<=0&&x-y+d>=0)cout<<"YES"<<endl;else cout<<"NO"<<endl;}
}

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