

Input

The input contains a single integer a (1 ≤ a ≤ 30).

Output

Output a single integer.

Example

Input

3


Output

27
#!/usr/bin/env python3

def main():
    try:
        while True:
            print([4, 22, 27, 58, 85, 94, 121, 166, 202, 265, 274, 319, 346, 355, 378, 382, 391,
                438, 454, 483, 517, 526, 535, 562, 576, 588, 627, 634, 636, 645][int(input()) - 1])

    except EOFError:
        pass

main()
