Leetcode
Introduction
1.
First Chapter
1.1.
LC340 Longest Substring with At Most K Distinct Characters
1.2.
LC323 Number of Connected Components in an Undirected Graph
1.3.
LC255 Verify Preorder Sequence in Binary Search Tree
1.4.
LC254 Factor Combinations
1.5.
LC3 Longest Substring Without Repeating Characters
1.6.
LC265 Paint House II
1.7.
LC250 Count Univalue Subtrees
1.8.
LC329 Longest Increasing Path in a Matrix
1.9.
LC298 Binary Tree Longest Consecutive Sequence
1.10.
LC163 Missing Ranges
1.11.
LC325 Maximum Size Subarray Sum Equals k
1.12.
LC121 Best Time to Buy and Sell Stock
1.13.
LC101 Symmetric Tree
1.14.
LC118 Pascal's Triangle
1.15.
LintCode Permutation Index
1.16.
LintCode Permutation Index II
1.17.
Leetcode Wood Cut
1.18.
LintCode Delete Digits
1.19.
LeetCode35 Search Insert Position
1.20.
LC129 Sum Root to Leaf Numbers
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Leetcode
LC323 Number of Connected Components in an Undirected Graph
BFS的方法，盯住一个泳BFS先处理完，visted全部标记为true，再次遇到visited为false的时候，count＋＋就行了
