/in/foo.cc: In function 'bool cs(int)':
/in/foo.cc:20:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:46:9: warning: 'mi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<mi<<endl;
         ^~