User JavaDeveloper

57 votes

8 answers

36k views

Efficiently checking if a number is divisible by 3

java bitwise

asked Jun 2, 2014 at 21:48

32 votes

7 answers

66k views

Check for balanced parentheses

asked Apr 1, 2014 at 6:55

32 votes

4 answers

78k views

A* search algorithm

java algorithm search graph pathfinding

asked Dec 31, 2013 at 23:32

22 votes

3 answers

32k views

Find all paths from source to destination

java algorithm graph complexity

asked Mar 29, 2014 at 8:03

19 votes

1 answer

24k views

Excel column string to row number and vice versa

java algorithm number-systems

asked Mar 17, 2014 at 2:54

14 votes

2 answers

7k views

Count the one islands in the matrix

java matrix

asked Feb 15, 2014 at 1:18

12 votes

3 answers

61k views

Huffman code implementation

java algorithm compression

asked Mar 15, 2014 at 22:07

12 votes

3 answers

1k views

Speed dating algorithm to select the pair of dates

java algorithm

asked Mar 26, 2014 at 6:07

10 votes

3 answers

1k views

Find biggest basin

java algorithm matrix backtracking

asked May 6, 2014 at 8:53

10 votes

7 answers

38k views

Find the value nearest to k in the sorted array

java algorithm array

asked Apr 16, 2014 at 7:00

10 votes

2 answers

6k views

Find a path through a maze

java pathfinding

asked Feb 7, 2014 at 6:31

10 votes

2 answers

22k views

Find intersections of overlapping intervals

java optimization interval

asked Aug 24, 2013 at 21:04

10 votes

3 answers

28k views

Creating a binary search tree

java algorithm tree

asked Sep 29, 2013 at 20:07

8 votes

2 answers

9k views

Check if directed graph contains a cycle

java graph

asked Dec 25, 2013 at 10:06

8 votes

1 answer

2k views

Assembly line scheduling

java algorithm dynamic-programming

asked Apr 13, 2014 at 20:16

8 votes

3 answers

11k views

Interval search tree

java algorithm tree interval

asked Feb 18, 2014 at 20:38

8 votes

3 answers

1k views

Given a Perfect Binary Tree, reverse the alternate level nodes of the binary tree

java algorithm tree

asked Jul 2, 2014 at 6:39

8 votes

1 answer

17k views

Merge two linked list

java linked-list hashcode

asked Jul 8, 2014 at 18:04

8 votes

3 answers

2k views

Print all nodes that are at distance k from a leaf node

java tree

asked Aug 22, 2014 at 2:29

7 votes

3 answers

1k views

Check if a binary tree is balanced

java algorithm tree

asked Feb 9, 2015 at 15:18

7 votes

3 answers

2k views

Iterator of iterator

java algorithm iterator

asked Jul 9, 2014 at 17:25

7 votes

1 answer

2k views

Find the Next Greatest Element

java algorithm stack

asked Jun 21, 2014 at 20:47

7 votes

2 answers

9k views

Calculate fibonacci in O(log n)

java matrix fibonacci-sequence

asked May 27, 2014 at 21:26

7 votes

2 answers

5k views

Jump game to find minimum hops from source to destination

java algorithm

asked Mar 16, 2014 at 0:52

7 votes

1 answer

3k views

Tower of Hanoi solver

java algorithm game recursion tower-of-hanoi

asked Feb 9, 2014 at 6:26

7 votes

3 answers

31k views

Implementation of Dijkstra's algorithm

java algorithm graph

asked Oct 7, 2013 at 0:53

7 votes

2 answers

48k views

Create a tree from a list of nodes with parent pointers only

java tree

asked Sep 27, 2013 at 21:53

6 votes

3 answers

10k views

Flatten iterator for nested list

java algorithm iterator

asked Oct 17, 2013 at 16:07

6 votes

2 answers

10k views

Finding greatest value in array smaller than x

java algorithm array binary-search mathematics

asked Oct 21, 2013 at 16:44

6 votes

2 answers

43k views

Given N*N matrix, rotate it by 90 degree to left and right without extra memory

java matrix

asked Jan 28, 2014 at 7:30

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189 Questions

Efficiently checking if a number is divisible by 3

Check for balanced parentheses

A* search algorithm

Find all paths from source to destination

Excel column string to row number and vice versa

Count the one islands in the matrix

Huffman code implementation

Speed dating algorithm to select the pair of dates

Find biggest basin

Find the value nearest to k in the sorted array

Find a path through a maze

Find intersections of overlapping intervals

Creating a binary search tree

Check if directed graph contains a cycle

Assembly line scheduling

Interval search tree

Given a Perfect Binary Tree, reverse the alternate level nodes of the binary tree

Merge two linked list

Print all nodes that are at distance k from a leaf node

Check if a binary tree is balanced

Iterator of iterator

Find the Next Greatest Element

Calculate fibonacci in O(log n)

Jump game to find minimum hops from source to destination

Tower of Hanoi solver

Implementation of Dijkstra's algorithm

Create a tree from a list of nodes with parent pointers only

Flatten iterator for nested list

Finding greatest value in array smaller than x

Given N*N matrix, rotate it by 90 degree to left and right without extra memory