摘要:
Problem DescriptionA hat’s word is a word in the dictionary that is the concatenation of exactly two other words in the dictionary.You... 阅读全文
摘要:
Problem DescriptionGiven a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. ... 阅读全文
摘要:
Genos recently installed the game Zuma on his phone. In Zuma there exists a line of n gemstones, the i-th of which has color ci. The g... 阅读全文