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28 lines
569 B
28 lines
569 B
#include <bits/stdc++.h>
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using namespace std;
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#define maxn 20
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int a[maxn][maxn];
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//蛇型填数
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int main()
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{
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int n, x, y, tot = 0;
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scanf("%d", &n);
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memset(a, 0, sizeof(a));
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tot = a[x = 0][y = n - 1] = 1;
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while (tot < n * n)
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{
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while (x + 1 < n && !a[x + 1][y]) a[++x][y] = ++tot;
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while (y - 1 >= 0 && !a[x][y - 1]) a[x][--y] = ++tot;
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while (x - 1 >= 0 && !a[x - 1][y]) a[--x][y] = ++tot;
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while (y + 1 < n && !a[x][y + 1]) a[x][++y] = ++tot;
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}
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for (x = 0; x < n; x++)
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{
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for (y = 0; y < n; y++) printf("%3d", a[x][y]);
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printf("\n");
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}
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return 0;
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}
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