> #include <stdio.h>
> #include <string.h> 
> 
> int two[11];
> char map[2050][2050];
> int n;
> int l,r;
> int i;
> int j;
> int x;
> void huafen(int size,int xtop,int ytop)
> {
> 	if(size==1)	return;
> 	else
> 	{
> 		int ll,rr,i1,j1;
> 		int count;
> 		ll=xtop;
> 		rr=xtop+1;
> 		i1=ytop+two[size]-1;
> 		for(count=0;count<two[size-1];i1--,ll--,rr++,count++)
> 		{
> 			map[i1][ll]='\\';
> 			map[i1][rr]='/';
> 		}
> 		for(j1=ll+2,count=0;count<two[size]-2;count++)
> 		{
> 			map[i1][j1++]='_';
> 		}
> 		huafen(size-1,xtop,ytop);
> 		huafen(size-1,ll,i1+1);
> 		huafen(size-1,rr-1,i1+1);
> 	}
> }
> 
> 
> void main()
> {
> 	two[1]=2;
> 	two[2]=4;
> 	two[3]=8;
> 	two[4]=16;
> 	two[5]=32;
> 	two[6]=64;
> 	two[7]=128;
> 	two[8]=256;
> 	two[9]=512;
> 	two[10]=1024;
> 	two[11]=2048;
> 	scanf("%d",&n);
> 	while(n!=0)
> 	{
> 		memset(map,' ',sizeof(char)*2048*2048);
> 		if(n==1)
> 		{
> 			printf(" /\\ \n");
> 			printf("/__\\ \n");
> 		}
> 		else
> 		{
> 			l=two[n]-1;
> 			r=two[n];
> 			for(i=0;i<two[n];l--,r++,i++)
> 			{
> 				map[i][l]='/';
> 				map[i][r]='\\';
> 			}
> 			for(j=1;j<two[n+1]-1;j++)
> 			{
> 				map[i-1][j]='_';
> 			}
> 			huafen(n,two[n]-1,0);
> 			x=two[n]+1;
> 			for(i=0;i<two[n];i++,x++)
> 			{
> 				for(j=0;j<x;j++)
> 				{
> 					printf("%c",map[i][j]);
> 				}
> 				printf("\n");
> 			}
> 			printf("\n");
> 		}
> 		scanf("%d",&n);
> 	}
> }