LeetCode

The Java solutions for LeetCode problems.

Problems

Table of Contents

• 001-050
• 201-250
• 251-300
• 401-450
• 451-500
• 801-850
• 1001-1050
• 1051-1100
• 1151-1200

Problems 001-050

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#	Title	Solutions	Time	Space	Comments
1	Two Sum	Java(324ms)	O(N)	O(N)
2	Add Two Numbers	Java(428ms)	O(Max(N, M))	O(1)
3	Longest Substring Without Repeating Characters	Java(368ms)	O(N)	O(1)	C# use array will slower
4	Median of Two Sorted Arrays	Java(596ms)	O(Log(N+M))	O(1)
5	Longest Palindromic Substring	Java(316ms)	O(N)	O(N)	Use Manacher's Algorithm

Problems 201-250

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#	Title	Solutions	Time	Space	Comments
222	Count Complete Tree Nodes	Java(0ms)	O(log2N)	O(1)

Problems 251-300

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#	Title	Solutions	Time	Space	Comments
287	Find the Duplicate Number	Java(1ms)	O(N)	O(1)

Problems 401-450

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#	Title	Solutions	Time	Space	Comments
410	Split Array Largest Sum	Java(1ms)	O(N∗log(sum of array))	O(1)	Binary Search

Problems 451-500

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#	Title	Solutions	Time	Space	Comments
482	License Key Formatting	Java(14ms)	O(N)	O(N)

Problems 801-850

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#	Title	Solutions	Time	Space	Comments
843	Guess the Word	Java(1ms)	O(N2)	O(N)

Problems 1001-1050

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#	Title	Solutions	Time	Space	Comments
1007	Minimum Domino Rotations For Equal Row	Java(4ms)	O(N)	O(1)

Problems 1051-1100

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#	Title	Solutions	Time	Space	Comments
1057	Campus Bikes	Java(49ms)	O(N*M)	O(N*M)
1096	Brace Expansion II	Java(44ms)	O(N)	?

Problems 1151-1200

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#	Title	Solutions	Time	Space	Comments
1197	Minimum Knight Moves	Java(2ms)	O(N2)	O(N2)