#include<iostream>
#include<iomanip>
using namespace std;
int main() {
int n, i, j, k[100][100] = {0};
cin >> n;
for (i = n,j = 1; i >= 1,j <= n; i--,j++) {
k[i][j] = 1;
}
for (i = 1; i <= n; i++) {
for (j = 1; j <= n; j++)cout << setw(3) << k[i][j];
对角线2
