AC code

#include<queue>
#include<stack>
#include<cmath>
#include<math.h>
#include<cstdio>
#include<string>
#include<vector>
#include<bitset>
#include<stdio.h>
#include<iomanip>
#include<algorithm>
#include<string.h>
#include<iostream>
#include<utility>
#include<cstring>
#include<fstream>
using namespace std;
typedef long long ll;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int mlist[1026][10] = { 1 };
int main()
{
	int m;
	cin >> m;
	int n = 1 << m;
	int k = 1;
	int half = 1;
	while ( k <= m )
	{
		//TODO
		for ( int i = 0 ; i < half ; i++ )
		{
			for ( int j = 0 ; j < half ; j++ )
			{
				mlist[i][ j + half ] = mlist[i][j] + half;
			}
		}
		for ( int i = 0 ; i < half ; i++ )
		{
			//TODO
			for ( int j = 0 ; j < half ; j++ )
			{
				//TODO
				mlist[ i + half ][j] = mlist[i][ j + half ];
				mlist[ i + half ][ j + half ] = mlist[i][j];
			}
		}
		half *= 2;
		k++;
	}
	for ( int i = 0 ; i < n ; i++ )
	{
		//TODO
		for ( int j = 0 ; j < n ; j++ )
		{
			//TODO
			cout << mlist[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
}