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问题描述Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letter... 阅读全文
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问题描述Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.If the fractional part is repeat... 阅读全文
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Problem I翻转链表程序（简洁版）非递归ListNode reverseList(ListNode head) { ListNode pre = null; ListNode cur = head; while (cur != null ) { ListNode next = cur.ne... 阅读全文
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http://blog.csdn.net/huagong_adu/article/details/7619665 阅读全文
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问题描述Sort a linked list using insertion sort.解决思路1.设置first和last指针；2.插入分三种情况。程序public class Solution { public ListNode insertionSortList(ListNode hea... 阅读全文
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问题描述Given an unsorted integer array, find the first missing positive integer.For example,Given[1,2,0]return3,and[3,4,-1,1]return2.Your algorithm shoul... 阅读全文
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Best Time to Buy and Sell Stock ISay you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to com... 阅读全文
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问题描述Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example,Given [100, 4, 200, 1, 3, 2],The lo... 阅读全文
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问题描述Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the ... 阅读全文
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问题描述Given a set ofnon-overlappingintervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals were initi... 阅读全文