CE求佬调

//P5461 赦免战俘
#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll a1[100000][100000], n;
void a(ll x,ll y,ll n){
	if(n==0){
		a1[x][y] = 1;
	}else{
		a(x,y+(1<<(n-1)),n-1);
		a(x+(1<<(n-1)),y,n-1);
		a(x+(1<<(n-1)),y+(1<<(n-1)),n-1);
	}
}
int main (){
cin >> n;
a(0,0,n);
for(int i=0;i<1<<n;i++){
	for(int j=0;j<1<<n;j++){
		cout<<a1[i][j];
	}
	cout << "\n";
}
return 0;
}