24 Game

The 24 game is an arithmetical puzzle in which the objective is to find a way to combine four integers using only basic arithmetic operations (+, -, ×, ÷) to get a result of 24. Each integer must be used exactly once.

The variation we use is played with a standard 52-card deck, with integers ranging from 1 to 13. Print all solvable quadruples of integers. The integers of each quadruple should be printed in non-decreasing order.

Keep in mind that some solutions involve fractions. For example, the only solution to 1 3 4 6 is 6/(1-3/4).

External links: Rosetta Code, Rosetta Code (2), Wikipedia