摘要：
137. Single Number II Given a non-empty array of integers, every element appears three times except for one, which appears exactly once. Find that sin 阅读全文
摘要：
136. Single Number Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should 阅读全文
摘要：
135. Candy There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the f 阅读全文