mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-11-27 18:16:26 +00:00
64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
// R36471603
|
|
|
|
#include <bits/stdc++.h>
|
|
|
|
using namespace std;
|
|
|
|
int n, k, a[15][15], ax, ay;
|
|
|
|
int main() {
|
|
k = ax = 1;
|
|
|
|
scanf("%d", &n);
|
|
|
|
/**
|
|
* ax, ay+1 -> 右侧
|
|
* ax, ay-1 -> 左侧
|
|
* ax+1, ay -> 下方
|
|
* ax-1, ay -> 上方
|
|
*
|
|
* 0 --- 1 ---------- ay ----------> n
|
|
* | +------+------+------+------+------+
|
|
* 1 | | | ax-1 | | |
|
|
* | | | | ay | | |
|
|
* | +------+------+------+------+------+
|
|
* a | | ax | ax | ax | |
|
|
* x | | ay-1 | ay | ay+1 | |
|
|
* | +------+------+------+------+------+
|
|
* | | | | ax+1 | | |
|
|
* | | | | ay | | |
|
|
* | +------+------+------+------+------+
|
|
* | | | | | | |
|
|
* | | | | | | |
|
|
* | +------+------+------+------+------+
|
|
* | | | | | | |
|
|
* n | | | | | | n
|
|
* +------+------+------+------+------+
|
|
* n
|
|
*/
|
|
|
|
while (k <= n * n) {
|
|
while (ay < n && !a[ax][ay + 1]) { // 右侧 不过边界 && 未填数
|
|
a[ax][++ay] = k++;
|
|
}
|
|
while (ax < n && !a[ax + 1][ay]) { // 下方 不过边界 && 未填数
|
|
a[++ax][ay] = k++;
|
|
}
|
|
while (ay > 1 && !a[ax][ay - 1]) { // 左侧 不过边界 && 未填数
|
|
a[ax][--ay] = k++;
|
|
}
|
|
while (ax > 1 && !a[ax - 1][ay]) { // 上方 不过边界 && 未填数
|
|
a[--ax][ay] = k++;
|
|
}
|
|
}
|
|
|
|
for (int i = 1; i <= n; i++) {
|
|
for (int j = 1; j <= n; j++) {
|
|
printf("%3d", a[i][j]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|