1 files changed, 62 insertions, 0 deletions
diff --git a/challenge-191/roger-bell-west/javascript/ch-2.js b/challenge-191/roger-bell-west/javascript/ch-2.js
new file mode 100755
index 0000000000..424b4641d5
--- /dev/null
+++ b/challenge-191/roger-bell-west/javascript/ch-2.js
@@ -0,0 +1,62 @@
+#! /usr/bin/node
+
+"use strict"
+
+function cutelist(n) {
+    let tab = [[false]];
+    let t = [];
+    for (let x = 1; x <= n; x++) {
+        tab.push(new Array(n+1).fill(false));
+        t.push(x);
+    }
+    for (let x = 1; x <= n; x++) {
+        for (let y = 1; y <= x; y++) {
+            if (x % y != 0 && y % x != 0) {
+                tab[x][y] = true;
+                tab[y][x] = true;
+            }
+        }
+    }
+    let count = 0;
+    let stackl = [[]];
+    let stackc = [t];
+    while (stackl.length != 0) {
+        let l = stackl.pop();
+        let c = stackc.pop();
+        if (c.length == 0 && l.length == n)  {
+            count++;
+        } else {
+            let place = l.length + 1;
+            for (let candidate of c) {
+                if (!tab[place][candidate]) {
+                    let q = Array.from(l);
+                    q.push(candidate);
+                    stackl.push(q);
+                    stackc.push(Array.from(c.filter(i => i != candidate)));
+                }
+            }
+        }
+    }
+    return count;
+}
+
+if (cutelist(2) == 2) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (cutelist(10) == 700) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (cutelist(15) == 24679) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write("\n");