题目描述：
Implement a MapSum class with insert, and sum methods.
For the method insert, you'll be given a pair of (string, integer). The string represents the key and the integer represents the value. If the ...
作者归档：在线疯狂
[LeetCode]Map Sum Pairs
[LeetCode]Valid Palindrome II
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题目描述：
LeetCode 680. Valid Palindrome II
Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome.
Example 1:
Input: "aba" Output: True
Example 2:
Input: "abca" Output: True Explanation: You ...
LeetCode Weekly Contest 49解题报告
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LeetCode.
LeetCode Weekly Contest 49是LeetCode举办的第五十三场正式周赛，共4道题目，比赛时长1.5小时。
比赛链接：https://leetcode.com/contest/leetcode-weekly-contest-49/
题解列表：
LeetCode 674. Longest Continuous Increasing Subsequence
LeetCode 676. Implement Magic Dictionary
[LeetCode]Number of Longest Increasing Subsequence
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题目描述：
LeetCode 673. Number of Longest Increasing Subsequence
Given an unsorted array of integers, find the number of longest increasing subsequence.
Example 1:
Input: [1,3,5,4,7] Output: 2 Explanation: The two longest increasing subsequence are [1, 3 ...
[LeetCode]Cut Off Trees for Golf Event
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题目描述：
LeetCode 675. Cut Off Trees for Golf Event
You are asked to cut off trees in a forest for a golf event. The forest is represented as a non-negative 2D map, in this map:
0represents theobstaclecan't ...