foo.cc: In function 'int main()':
foo.cc:54:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |     scanf("%d",&T);
      |     ~~~~~^~~~~~~~~
foo.cc:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |         scanf("%d",&n);
      |         ~~~~~^~~~~~~~~
foo.cc:57:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |         for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) scanf("%d",&d[i][j]);
      |                                                     ~~~~~^~~~~~~~~~~~~~~

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