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#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int dx[] = {0, 1, 0, -1}; // 右下左上
int dy[] = {1, 0, -1, 0}; // 右下左上
int a[N][N];
int main() {
int n = 5, m = n * n;
int idx = 1;
int x = 0, y = 0, p = 0;
while (idx <= m) {
a[x][y] = idx; //
idx++; // 值在长大
// p是说方向数组中的游标，它是需要变化的，什么情况下变化呢？
// 1、出界了就变化
if (x + dx[p] >= n || y + dy[p] >= n || a[x + dx[p]][y + dy[p]])
p = (p + 1) % 4;
// 下一个坐标位置
x += dx[p], y += dy[p];
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++)
printf("%3d", a[i][j]);
cout << endl;
return 0;
