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递归做的,780k,94MS#include <iostream>
#include <cmath>
using namespace std;
int n;
char map[750][750];
void digui(int n,int x,int y)
{
if(n==1)
map[x][y] = 'X';
else
{
int size = pow(3+0.0,n-2);
digui(n-1,x,y);
digui(n-1,x+2*size,y);
digui(n-1,x+size,y+size);
digui(n-1,x,y+2*size);
digui(n-1,x+2*size,y+2*size);
}
}
int main()
{
int i,j;
while(cin>>n && n!=-1)
{
int size = pow(3+0.0,n-1);
for(i=1;i<=size;i++)
for(j=1;j<=size;j++)
map[i][j] = ' ';
digui(n,1,1);
for(i=1;i<=size;i++)
{
for(j=1;j<=size;j++)
cout<<map[i][j];
cout<<endl;
}
cout<<"-"<<endl;
}
return 0;
}
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