求助28分 c

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#define ll long long
#define ull unsigned long long
int read()
{
    char ch=getchar();
    int x=0,f=1;
    while(ch<'0'||ch>'9')
    {
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9')
    {
        x=x*10+ch-'0';
        ch=getchar();
    }
    return x*f;
}
void divv(int k,int x,int y,int lx,int ly)
{
    if(k==1)
    {
        if(x%2==1&&y%2==1) printf("%d %d 1\n",x+1,y+1); 
        else if (x%2==1&&y%2==0) printf("%d %d 2\n",x+1,y-1);
        else if (x%2==0&&y%2==1) printf("%d %d 3\n",x-1,y+1);
        else if(x%2==0&&y%2==0) printf("%d %d 4\n",x-1,y-1);
        return ;
    }
    //1<<(k-1)
    if(x<=lx&&y<=ly) 
    {
        printf("%d %d 1\n",lx+1,ly+1);
        divv(k-1,x,y,lx-(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx+1,ly+1,lx+(1<<(k-2)),ly+(1<<(k-2)));
        divv(k-1,lx,ly+1,lx-(1<<(k-2)),ly+(1<<(k-2)));
        divv(k-1,lx+1,ly,lx+(1<<(k-2)),ly-(1<<(k-2)));
    }
    else if(x>lx&&y<=ly) 
    {
        printf("%d %d 3\n",lx,ly+1);
        divv(k-1,x,y,lx+(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx,ly,lx-(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx,ly+1,lx-(1<<(k-2)),ly+(1>>(k-2)));
        divv(k-1,lx+1,ly+1,lx+(1>>(k-2)),ly+(1>>(k-2)));
    }
    else if(x<=lx&&y>ly) 
    {
        printf("%d %d 2\n",lx+1,ly);
        divv(k-1,x,y,lx-(1<<(k-2)),ly+(1<<(k-2)));
        divv(k-1,lx,ly,lx-(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx+1,ly,lx+(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx+1,ly+1,lx+(1<<(k-2)),ly+(1<<(k-2)));
    }
    else if(x>lx&&y>ly) 
    {
        printf("%d %d 4\n",lx,ly);
        divv(k-1,x,y,lx+(1<<(k-2)),ly+(1<<(k-2)));
        divv(k-1,lx,ly,lx-(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx+1,ly,lx+(1<<(k-2)),ly-(1<<(k-2)));
        divv(k-1,lx,ly+1,lx-(1<<(k-2)),ly+(1<<(k-2)));
    }
}
int main ()
{
    int k=read();
    int x=read(),y=read();
    divv (k,x,y,1<<(k-1),1<<(k-1));
}