位运算

C. The Very Beautiful Blanket

2023-03-1719:13:29

性质：两个相同的数异或等于0
用类似的性质例如
000000011
100000011
100000010
000000010
构造这样的四个数
c++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl "\n"
int main() {

ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);

int T = 1;

cin >> T;

while (T--)

{

int n, m;

cin >> n >> m;

cout << n * m << endl;

for (int i = 1; i <= n; i++)

{

for (int j = 1; j <= m; j++)

{

cout << (j + (1 << 8) * (i - 1)) << " ";

}

cout << endl;

}

}

return 0;

}