foo.cc: In function 'int max_squre(int, int&)':
foo.cc:19:1: warning: no return statement in function returning non-void [-Wreturn-type]
   19 | }
      | ^
foo.cc: In function 'int max_rectangle(int, int&)':
foo.cc:62:1: warning: no return statement in function returning non-void [-Wreturn-type]
   62 | }
      | ^

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