foo.cc: In function 'int mp(char)':
foo.cc:57:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
foo.cc: In function 'int main()':
foo.cc:115:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",t+1);
  ~~~~~^~~~~~~~~~
foo.cc:118:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",s[i]+1);
   ~~~~~^~~~~~~~~~~~~

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