萌新56pts的奇怪错误

2 4 7 WA 求调

#include<cstdio>
#define printf(str,a,b) printf(str,b,a)
const int M=1200;

void solve(int x,int y,int size,int ux,int uy){
    if(size==2){
        if(ux==x&&uy==y) printf("%d %d 1\n",x+1,y+1);
        if(ux==x+1&&uy==y) printf("%d %d 2\n",x,y+1);
        if(ux==x&&uy==y+1) printf("%d %d 3\n",x+1,y);
        if(ux==x+1&&uy==y+1) printf("%d %d 4\n",x,y);
        return;
    }

    int subsize=size/2;
    int midx=x+subsize,midy=y+subsize;

    //  1 \ 2
    //----\----
    //  3 \ 4

    if(ux<midx&&uy<midy){
        printf("%d %d 1\n",midx,midy);
        solve(x,y,subsize,ux,uy);
        solve(midx,y,subsize,midx,midy-1);
        solve(x,midy,subsize,midx-1,midy);
        solve(midx,midy,subsize,midx,midy);
        return;
    }

    if(ux>=midx&&uy<midy){
        printf("%d %d 2\n",midx-1,midy);
        solve(x,y,subsize,midx-1,midy-1);
        solve(midx,y,subsize,ux,uy);
        solve(x,midy,subsize,midx-1,midy);
        solve(midx,midy,subsize,midx,midy);
        return;
    }

    if(ux<midx&&uy>=midy){
        printf("%d %d 3\n",midx,midy-1);
        solve(x,y,subsize,midx-1,midy-1);
        solve(midx,y,subsize,midx,midy-1);
        solve(x,midy,subsize,ux,uy);
        solve(midx,midy,subsize,midx,midy);
        return;
    }

    if(ux>=midx&&uy>=midy){
        printf("%d %d 4\n",midx-1,midy-1);
        solve(x,y,subsize,midx-1,midy-1);
        solve(midx,y,subsize,midx,midy-1);
        solve(x,midy,subsize,midx-1,midy);
        solve(midx,midy,subsize,ux,uy);
        return;
    }
}

int k,x,y;
int main(){
    scanf("%d%d%d",&k,&x,&y);
    solve(1,1,1<<k,x,y);
    return 0;
}