import math

def solution(w, h, s):
    return str(sum([s**cycle for cycle in generate_cycles(w, h)])/(math.factorial(w)*math.factorial(h)))

def generate_cycles(w, h):
    yield 1


tests = [
        ([2, 3, 4], '430'),
        ([2, 2, 2], '7'),
        ([1, 1, 2], '2'),
        ([1, 1, 3], '3'),
        ([2, 1, 2], '3'),
        ([1, 2, 2], '3'),
        ([3, 1, 2], '4'),
        ([1, 3, 2], '4'),
        ([2, 3, 2], '13'),
        ]

for i, o in tests:
    result = solution(*i)
    print (i, result == o, result, o)