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",&k);
      |     ~~~~~^~~~~~~~~
foo.cc:57:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |         scanf("%d %d %d %d",&a,&b,&c,&t);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:61:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   61 |             scanf("%d",&ma[i][j][k]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~

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