萌新求助

#include<bits/stdc++.h>
#define int long long
#define LeftUp    work(a+n-1,b+n-1,a,b,n)
#define RightUp   work(a+n-1,b+n,a,b+n,n)
#define LeftDown  work(a+n,b+n-1,a+n,b,n)
#define RightDown work(a+n,b+n,a+n,b+n,n)
using namespace std;
int k,x,y,n;
void work(int a,int b,int x,int y,int n){
    if(n==1) return;
    n>>=1;
    if(x<=a+n-1&&y<=b+n-1){
        printf("%lld %lld 1\n",x+n,y+n);
        work(x,y,a,b,n);
        LeftDown;
        RightUp;
        RightDown;
    }
    else if(x<=a+n-1&&y>b+n-1){
        printf("%lld %lld 2\n",x+n,y+n-1);
        work(x,y,a,b+n,n);
        LeftUp;
        RightUp;
        RightDown;
    }
    else if(x>a+n-1&&y<=b+n-1){
        printf("%lld %lld 3\n",x+n+1,y+n);
        work(x,y,a+n,b,n);
        LeftUp;
        LeftDown;
        RightDown;
    }
    else if(x>a+n-1&&y>b+n-1){
        printf("%lld %lld 4\n",x+n+1,y+n+1);
        work(x,y,a+n,b+n,n);
        LeftUp;
        LeftDown;
        RightUp;
    }
}
signed main(){
    scanf("%lld%lld%lld",&k,&x,&y);
    n=pow(2,k);
    work(1,1,x,y,n);
    return 0;
}