1 files changed, 34 insertions, 0 deletions
diff --git a/challenge-192/roger-bell-west/javascript/ch-1.js b/challenge-192/roger-bell-west/javascript/ch-1.js
new file mode 100755
index 0000000000..c81f2c7f45
--- /dev/null
+++ b/challenge-192/roger-bell-west/javascript/ch-1.js
@@ -0,0 +1,34 @@
+#! /usr/bin/node
+
+"use strict"
+
+function binaryflip(n) {
+    let m = n;
+    let r = 0;
+    while (m > 0) {
+        m >>= 1;
+        r += 1;
+    }
+    return (1 << r) - 1 - n;
+}
+
+if (binaryflip(5) == 2) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (binaryflip(4) == 3) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (binaryflip(6) == 1) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write("\n");