foo.cc: In function 'int main()':
foo.cc:7:3: warning: statement has no effect [-Wunused-value]
  0<=x;
  ~^~~
foo.cc:9:2: error: expected ';' before 'cout'
  cout<<x+y<<endl;
  ^~~~
foo.cc:8:3: warning: statement has no effect [-Wunused-value]
  y<=32767
  ~^~~~~~~

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