June 2018 Update

Task/Factorial/C/factorial-2.c

@@ -1,3 +1,8 @@
-int factorial(int n) {
-    return n == 0 ? 1 : n * factorial(n - 1);
+int factorialSafe(int n) {
+    int result = 1;
+    if(n<0)
+        return -1;
+    for (int i = 1; i <= n; ++i)
+        result *= i;
+    return result;
 }