foo.cc: In function 'int shen(int, int, int)':
foo.cc:35:1: warning: control reaches end of non-void function [-Wreturn-type]
   35 | }
      | ^
foo.cc: In function 'int main()':
foo.cc:56:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |     scanf("%d %d %d",&n,&m,&w);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:60:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   60 |         scanf("%s",line);
      |         ~~~~~^~~~~~~~~~~
foo.cc:69:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   69 |         scanf("%s",word);
      |         ~~~~~^~~~~~~~~~~

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