Initial data commit

Task/Mutual-recursion/Elena/mutual-recursion.elena

@@ -0,0 +1,20 @@
+import extensions;
+import system'collections;
+
+F = (n => (n == 0) ? 1 : (n - M(F(n-1))) );
+M = (n => (n == 0) ? 0 : (n - F(M(n-1))) );
+
+public program()
+{
+    var ra := new ArrayList();
+    var rb := new ArrayList();
+
+    for(int i := 0, i <= 19, i += 1)
+    {
+        ra.append(F(i));
+        rb.append(M(i))
+    };
+
+    console.printLine(ra.asEnumerable());
+    console.printLine(rb.asEnumerable())
+}