场上死活构造不出来,然后看了题解之后,明白了。题目中给了
#include<bits/stdc++.h>
using namespace std;
int arr[1050][1050];
int main()
{
arr[1][1] = 1;
arr[1][2] = 1;
arr[2][1] = 1;
arr[2][2] = -1;
int n;
cin >> n;
for(int k = 2;k < n; k *= 2)
{
for(int i = 1;i <= k; i++)
{
for(int j = 1;j <= k; j++)
{
arr[i + k][j] = arr[i][j + k] = arr[i][j];
arr[i + k][j + k] = -arr[i][j];
}
}
}
for(int i = 1;i <= n; i++)
{
for (int j = 1; j <= n; j++)
cout << arr[i][j] << " ";
puts("");
}
return 0;
}