Family Day update

Task/Ackermann-function/JavaScript/ackermann-function-3.js

@@ -0,0 +1,20 @@
+function stackermann(M, N) {
+  const stack = [];
+  for (;;) {
+    if (M === 0) {
+      N++;
+      if (stack.length === 0) return N;
+      const r = stack[stack.length-1];
+      if (r[1] === 1) stack.length--;
+      else r[1]--;
+      M = r[0];
+    } else if (N === 0) {
+      M--;
+      N = 1;
+    } else {
+      M--
+      stack.push([M, N]);
+      N = 1;
+    }
+  }
+}