#!/usr/bin/env python3

# See 116

def p(ms, n, tbl=False):
    if n < min(ms):
        return n>=0
    if tbl==False:
        tbl = []
    if n-min(ms) >= len(tbl):
        r = p(ms, n-1, tbl) + sum(p(ms, n-m, tbl) for m in ms)
        tbl.append(r)
    return tbl[n-min(ms)]

print(p((2,3,4), 50))