CF488B Candy Boxes

There is an old tradition of keeping $ 4 $ boxes of candies in the house in Cyberland. The numbers of candies are special if their arithmetic mean, their median and their range are all equal. By definition, for a set $ {x_{1},x_{2},x_{3},x_{4}} $ ( $ x_{1}

There is an old tradition of keeping $ 4 $ boxes of candies in the house in Cyberland. The numbers of candies are special if their arithmetic mean, their median and their range are all equal. By definition, for a set $ {x_{1},x_{2},x_{3},x_{4}} $ ( $ x_{1}

There is an old tradition of keeping $ 4 $ boxes of candies in the house in Cyberland. The numbers of candies are special if their arithmetic mean, their median and their range are all equal. By definition, for a set $ {x_{1},x_{2},x_{3},x_{4}} $ ( $ x_{1}

For the first sample, the numbers of candies in $ 4 $ boxes can be $ 1,1,3,3 $ . The arithmetic mean, the median and the range of them are all $ 2 $ . For the second sample, it's impossible to find the missing number of candies. In the third example no box has been lost and numbers satisfy the condition. You may output $ b $ in any order.