/in/foo.cc:21:6: error: invalid preprocessing directive #find
     #find k,that satisfies ceil(k*(a/A))<=floor(k*(b/B))
      ^~~~
/in/foo.cc:1:1: error: 'def' does not name a type
 def gcd(x,y):
 ^~~
/in/foo.cc:39:1: error: 'print' does not name a type
 print solve(trans(tmp[0]),trans(tmp[1]))
 ^~~~~