@@ -0,0 +1,287 @@
+import java.util.Scanner;%0A%0Apublic class Main %7B%0A%0A    public static void main(String%5B%5D args) %7B%0A%0A        Scanner sc = new Scanner(System.in);%0A%0A        while (sc.hasNext()) %7B%0A%0A            int num = sc.nextInt();%0A%0A            System.out.println(num * (num + 1) / 2 + 1);%0A%0A        %7D%0A%0A    %7D%0A%0A%7D%0A

Create : 0057