foo.cc:5: warning: ignoring #pragma warning  [-Wunknown-pragmas]
    5 | #pragma warning(disable:4996)
      | 
foo.cc: In function 'int main()':
foo.cc:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
foo.cc:20:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |             scanf("%d", &g[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~

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