Nakul NakulRajan

NakulRajan / ExcelColoumns.java

Created July 9, 2016 16:25


	import org.junit.Test;

	import static org.junit.Assert.assertEquals;

	/**
	* Given a positive integer, return its corresponding column title as appear in an Excel sheet.
	*
	* Example:
	* 1 -> A

NakulRajan / MultiplyArray.java

Created July 9, 2016 16:20

	import org.junit.Test;

	import java.util.ArrayList;
	import java.util.List;

	/**
	* Given two numbers as arrays multiply them.
	*/
	public class MultiplyArray {

NakulRajan / BalancedTree.java

Created July 9, 2016 04:50

	import org.junit.Test;

	import java.util.ArrayList;
	import java.util.Arrays;

	import static org.junit.Assert.assertEquals;

	/**
	* Given a binary tree, determine if it is height-balanced.
	* For this problem, a height-balanced binary tree is defined as a binary tree in

NakulRajan / ValidParentheses.java

Last active July 9, 2016 04:04

Check whether Valid Parentheses

	import org.junit.Test;

	import java.util.HashMap;
	import java.util.Stack;

	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;

	/**
	* Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

NakulRajan / BlobCount.java

Last active July 8, 2016 17:00

Given a character matrix and a char, find the number of character islands

	package Graphs;

	import org.junit.Test;

	import static org.junit.Assert.assertEquals;

	/**
	* Given a 2D matrix of characters like
	* BBBBBBB
	* GGBBBGG