Array Addition

For this challenge you will determine if numbers in an array can add up to a certain number in the array.

4292 solutions

Solution

Optimal Assignments

For this challenge you will be optimally assigning tasks to a number of machines.

499 solutions

Solution

Shortest Path

For this challenge you will have to determine the shortest path from one node to an end node.

1122 solutions

Solution

Pattern Chaser

For this challenge you will be given a string and you will have to determine whether some sort of pattern exists.

733 solutions

Solution

Weighted Path

For this challenge you will have to determine the shortest weighted path from one node to an end node.

354 solutions

Solution

Binary Search Tree LCA

For this challenge you will attempt to find the lowest common ancestor of a binary search tree.

231 solutions

Solution

Gas Station

For this challenge you will be determining whether a car can get around a route with a limited amount of gas.

570 solutions

Solution

Powers of Two

For this challenge you will be determining whether or not a number is a power of two.

8107 solutions

Solution

Parallel Sums

For this challenge you will determine how to properly split an array into two sets.

137 solutions

Solution

Pascals Triangle

For this challenge you will determine the next number in a row from Pascal's triangle.

99 solutions

Solution

Bracket Combinations

This challenge will require knowledge of basic mathematical combinations.

125 solutions

Solution

Max Subarray

For this challenge you will determine the largest sum subarray.

622 solutions

Solution

K Unique Characters

For this challenge you will be searching a string for a particular substring.

414 solutions

Solution

Bitmap Holes

For this challenge you will be searching within a 2D matrix.

303 solutions

Solution

Maximal Square

For this challenge you will be searching a matrix for the largest square submatrix.

658 solutions

Solution

Maximal Rectangle

For this challenge you will be searching a matrix for the largest rectangle submatrix.

37 solutions

Solution

Symmetric Tree

For this challenge you will traverse a binary tree and determine if it is symmetric.

266 solutions

Solution

Binary Tree LCA

For this challenge you will attempt to find the lowest common ancestor of a binary tree.

136 solutions

Solution

Other Products

For this challenge you will return the product of a set of elements in an array.

1666 solutions

Solution

LRU Cache

For this challenge you will determine the order of elements within a simulated cache.

172 solutions

Solution

Wave Sorting

For this challenge you will determine if numbers in an array can be sorted in a particular way.

1131 solutions

Solution

Tree Constructor

For this challenge you will determine if an array of integer pairs can form a binary tree properly.

160 solutions

Solution

Longest Increasing Sequence

For this challenge you will compute the length of the longest increasing subsequence.

1097 solutions

Solution

Two Sum

For this challenge you will determine if two elements can sum to some larger number.

1660 solutions

Solution

Power Set Count

For this challenge you will determine the length of a power set.

973 solutions

Solution

Word Split

For this challenge you will attempt to split a long string of characters into actual words.

325 solutions

Solution

Palindromic Substring

For this challenge you will be finding the longest palindromic substring.

237 solutions

Solution

Bipartite Matching

For this challenge you will be finding the maximum cardinality matching of a bipartite graph.

40 solutions

Solution

Trapping Water

For this challenge you will determine the largest amount of water you can trap within a boundary.

135 solutions

Solution

Matrix Path

For this challenge you will determine if a path exists in a boolean matrix.

69 solutions

Solution

Seating Students

For this challenge you will determine how many different ways students can sit next to each other.

139 solutions

Solution

Longest Matrix Path

For this challenge you will be searching for the longest path in a 2D matrix.

58 solutions

Solution

Food Distribution

For this challenge you will determine how to optimally distribute food to people.

565 solutions

Solution

Min Window Substring

For this challenge you will be searching for the optimal substring of k characters.

141 solutions

Solution

Three Sum

For this challenge you will determine if three elements can sum to some larger number.

672 solutions

Solution

City Traffic

For this challenge you will be finding the maximum traffic that will enter a node.

39 solutions

Solution

Correct Path

For this challenge you will be traversing a matrix searching for the correct path to take.

1052 solutions

Solution

Three Points

For this challenge you will be plotting a line on a Cartesian grid.

107 solutions

Solution

Longest Consecutive

For this challenge you will compute the length of the longest consecutive subsequence.

265 solutions

Solution

String Periods

For this challenge you will need to find the smallest repeating substring.

336 solutions

Solution

Wildcard Characters

For this challenge you will determine if a string matches a set of wildcard characters.

60 solutions

Solution

Plus Minus

For this challenge you will need to determine how to add or subtract numbers to end up with zero.

96 solutions

Solution

Moving Median

For this challenge you will calculate the median in an array within a sliding window.

107 solutions

Solution