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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     int n;
  5.     printf("n? ");
  6.     scanf("%d", &n);
  7.     int s = 2 * n;
  8.     int a[s + 1][s + 1];
  9.     int c = (s + 1) * (s + 1) - 1;
  10.     a[n][n] = 0;
  11.     for (int k = 0; k <= n; ++k) {
  12.         for (int i = k; i < s - k; ++i) a[i][s - k] = c--;
  13.         for (int i = k; i < s - k; ++i) a[s - k][s - i] = c--;
  14.         for (int i = k; i < s - k; ++i) a[s - i][k] = c--;
  15.         for (int i = k; i < s - k; ++i) a[k][i] = c--;
  16.     }
  17.     for (int i = 0; i <= s; ++i) {
  18.         for (int j = 0; j <= s; ++j) printf("%4d", a[i][j]);
  19.         puts("");
  20.     }
  21. }
Runtime error #stdin #stdout 0s 1157632KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/c0WbZe
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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