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64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
// R36471603
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#include <bits/stdc++.h>
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using namespace std;
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int n, k, a[15][15], ax, ay;
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int main() {
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k = ax = 1;
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scanf("%d", &n);
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/**
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* ax, ay+1 -> 右侧
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* ax, ay-1 -> 左侧
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* ax+1, ay -> 下方
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* ax-1, ay -> 上方
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*
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* 0 --- 1 ---------- ay ----------> n
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* | +------+------+------+------+------+
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* 1 | | | ax-1 | | |
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* | | | | ay | | |
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* | +------+------+------+------+------+
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* a | | ax | ax | ax | |
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* x | | ay-1 | ay | ay+1 | |
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* | +------+------+------+------+------+
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* | | | | ax+1 | | |
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* | | | | ay | | |
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* | +------+------+------+------+------+
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* | | | | | | |
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* | | | | | | |
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* | +------+------+------+------+------+
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* | | | | | | |
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* n | | | | | | n
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* +------+------+------+------+------+
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* n
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*/
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while (k <= n * n) {
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while (ay < n && !a[ax][ay + 1]) { // 右侧 不过边界 && 未填数
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a[ax][++ay] = k++;
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}
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while (ax < n && !a[ax + 1][ay]) { // 下方 不过边界 && 未填数
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a[++ax][ay] = k++;
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}
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while (ay > 1 && !a[ax][ay - 1]) { // 左侧 不过边界 && 未填数
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a[ax][--ay] = k++;
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}
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while (ax > 1 && !a[ax - 1][ay]) { // 上方 不过边界 && 未填数
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a[--ax][ay] = k++;
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}
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}
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for (int i = 1; i <= n; i++) {
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for (int j = 1; j <= n; j++) {
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printf("%3d", a[i][j]);
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}
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printf("\n");
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}
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return 0;
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}
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