foo.cc: In function 'int main()':
foo.cc:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |     scanf("%d",&l);
      |     ~~~~~^~~~~~~~~
foo.cc:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |     scanf("%d%d%d",&s,&t,&m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:49:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |         scanf("%d",&stone[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~

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