摘要：
Jump Game IIGiven an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents... 阅读全文
摘要：
ZigZag ConversionThe string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern i... 阅读全文
摘要：
Longest Consecutive SequenceGiven an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given[100, 4... 阅读全文