Hi, CodeForces.
Today I tried to implement interactive problem 753B - Интерактивные быки и коровы (простая версия) in Ruby. But all of my submissions (23586661, 23586795, 23586863, 23611181) got "Idleness limit exceeded on test 1".
Also this problem (and it's Hard version) has no Accepted submissions in Ruby.
Is CF bugged or am I doing something wrong?