/in/foo.cc: In function 'int main()':
/in/foo.cc:42:12: error: 'INT_MAX' was not declared in this scope
         o=-INT_MAX;y1=0;
            ^~~~~~~
/in/foo.cc:65:12: error: 'INT_MAX' was not declared in this scope
         o=-INT_MAX;y1=0;
            ^~~~~~~