#340. Loop: 1³+2³+...+n³
You get a positive integer n. Use a `for` loop to find **1³+2³+...+n³**.
### Input
One integer n (1 ≤ n ≤ 20).
### Output
One integer.
Examples
Input
18
Output
29241
Input
12
Output
6084
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.