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move solutions from Contest package away
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Contest/src/_20160820_1st_contest/FirstUniqChar.java

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Contest/src/_20160820_1st_contest/LexicographicalNumbers.java renamed to MEDIUM/src/medium/LexicographicalNumbers.java

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package _20160820_1st_contest;
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package medium;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.List;
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import java.util.*;
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import utils.CommonUtils;
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/**
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* Given an integer n, return 1 - n in lexicographical order.
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Contest/src/_20160820_1st_contest/LongestAbsoluteFilePath.java renamed to MEDIUM/src/medium/LongestAbsoluteFilePath.java

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package _20160820_1st_contest;
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import java.util.Stack;
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package medium;
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import utils.CommonUtils;
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import java.util.Stack;
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public class LongestAbsoluteFilePath {
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public static int lengthLongestPath(String input) {
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Stack<Integer> stack = new Stack();

README.md

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| # | Title | Solutions | Time | Space | Difficulty | Tag | Notes
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|-----|----------------|---------------|---------------|---------------|-------------|--------------|-----
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|415|[Add Strings](https://leetcode.com/problems/add-strings/)|[Solution](../../blob/master/EASY/src/easy/AddStrings.java)| O(n)|O(1) | Easy|
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|388|[Longest Absolute File Path](https://leetcode.com/problems/longest-absolute-file-path/)|[Solution](../../blob/master/MEDIUM/src/medium/LongestAbsoluteFilePath.java)| O(n)|O(d) | Medium| Stack
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|387|[First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/)|[Solution](../../blob/master/EASY/src/easy/FirstUniqueCharacterinaString.java)| O(n)|O(n) | Easy| HashMap
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|386|[Lexicographical Numbers](https://leetcode.com/problems/lexicographical-numbers/)|[Solution](../../blob/master/MEDIUM/src/medium/LexicographicalNumbers.java)| O(n)|O(1) | Medium|
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|350|[Intersection of Two Arrays II](https://leetcode.com/problems/intersection-of-two-arrays-ii/)|[Solution](../../blob/master/EASY/src/easy/IntersectionOfTwoArraysII.java)| O(m+n)|O((m+n)) could be optimized | Easy| HashMap, Binary Search
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|349|[Intersection of Two Arrays](https://leetcode.com/problems/intersection-of-two-arrays/)|[Solution](../../blob/master/EASY/src/easy/IntersectionOfTwoArrays.java)| O(m+n)|O(min(m,n)) | Easy| Two Pointers, Binary Search
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|325|[Maximum Size Subarray Sum Equals k](https://leetcode.com/problems/maximum-size-subarray-sum-equals-k/)|[Solution] | O(n)|O(n) | Medium| HashMap

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