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  1. #include <cstdio>
  2.  
  3. unsigned G[1000][1000];
  4.  
  5. int main()
  6. {
  7.     unsigned n; scanf("%u", &n);
  8.     if(n == 4){
  9.         puts("-1");
  10.         return 0;
  11.     }
  12.     for(size_t i = 0; i < n; i++){
  13.         G[i][(i+1)%n] = 1;
  14.     }
  15.     for(size_t i = 0; i < n; i++){
  16.         for(size_t j = 0; j < n; j++){
  17.             if(G[i][j] + G[j][i] == 0 && i != j){
  18.                 if(i % 2 == j % 2)
  19.                     G[i][j] = 1;
  20.                 else
  21.                     G[j][i] = 1;
  22.             }
  23.         }
  24.     }
  25.     for(size_t i = 0; i < n; i++){
  26.         for(size_t j = 0; j < n; j++){
  27.             printf("%u ", G[i][j]);
  28.         }
  29.         puts("");
  30.     }
  31.     return 0;
  32. }
  33.  
Runtime error #stdin #stdout 0s 7000KB
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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/XwY7fX
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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