Restructuring

solutions/ProjectEuler/031/desc.yml

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+title: Investigating combinations of English currency denominations.
+url: http://projecteuler.net/problem=31
+
+desc: |
+  In England the currency is made up of pound, £ and pence, p, and there are eight coins in general circulation:
+  1p, 2p, 5p, 10p, 20p, 50p, ñ (100p) and £ (200p).
+  It is possible to make £ in the following way:
+  1£ + 150p + 220p + 15p + 12p + 31p
+  How many different ways can £ be made using any number of coins?
+solution: Define the target value as 200 to simplify

solutions/ProjectEuler/031/problem31.php

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+<?php
+define("TOTAL", 200);
+$combo=0;
+$sum = 200;
+
+for ($a = 0; $a <= (TOTAL / 200); $a++) {
+    $sum_a = TOTAL - ($a * 200);
+    for ($b = 0; $b <= ($sum_a / 100); $b++) {
+        $sum_b = $sum_a - ($b * 100);
+        for ($c = 0; $c <= ($sum_b / 50); $c++) {
+            $sum_c = $sum_b - ($c * 50);
+            for ($d = 0; $d <= ($sum_c / 20); $d++) {
+                $sum_d = $sum_c - ($d * 20);
+                for ($e = 0; $e <= ($sum_d / 10); $e++) {
+                    $sum_e = $sum_d - ($e * 10);
+                    for ($f = 0; $f <= ($sum_e / 5); $f++) {
+                        $sum_f = $sum_e - ($f * 5);
+                        for ($g = 0; $g <= ($sum_e / 2); $g++) {
+                            $sum_g = $sum_f - ($g * 2);
+                            for ($h = 0; $h <= ($sum_g / 1); $h++) {
+
+                                if ($a * 200 + $b * 100 + $c * 50 + $d * 20 + $e * 10 + $f * 5 + $g * 2 + $h == TOTAL) {
+                                    $combo++;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+echo $combo;

solutions/ProjectEuler/031/solve.php

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+<?php
+$start = 200;
+
+for($c = 0; $c > $left; $c++);