<?php
require_once "../libraries/Math.php";
/**
* Write a program that outputs all possibilities to put + or - or nothing between the numbers 1, 2, ..., 9 (in this order)
* such that the result is always 100. For example: 1 + 2 + 34 – 5 + 67 – 8 + 9 = 100.
* @author Beau Durrant
*/
$desiredTotal = 100;
$math = new Math();
$permutations = $math->permutate(array(1, 2, 3, 4, 5, 6, 7, 8, 9));
$totals = $math->plusMinusVariants($permutations);
$results = array();
foreach ($totals as $groups) {
foreach ($groups as $equation => $total) {
if ($total == $desiredTotal) {
$results[$equation] = $total;
}
}
}
print_r($results);
