/in/foo.cc: In function 'int maxyinshu(int, int)':
/in/foo.cc:13:9: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return y;
         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:31:3: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  y/=t;
  ~^~~