Hoon language examples and exercises.

### Competitive Programming

Various exercises.

### Gleichniszahlenreihe

Challenge: the look-and-say sequence.

### Rhonda Numbers

Challenge: compute Rhonda Numbers.

### Roman Numerals

Challenge: printing and parsing roman numerals.

### Solitaire Cipher

Challenge: solitaire encryption cipher.

### Water Between Towers

Challenge: fill convex areas of a tower with water.

### ABC Blocks

Challenge: spell words with blocks.

### Luhn Number

Challenge: compute Luhn numbers.

### Emirp

Challenge: compute primes whose reverses are also primes.

### Restore IPs

Challenge: restore IP addresses that have lost their dots.

### Islands

Challenge: find the size of the biggest island in a 2D grid.

### Minimum Path Sum

Challenge: find the least expensive path through a 2D grid.

### Phone Letters

Challenge: return the strings that can be represented by numbers in a phonepad.