#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import itertools


# %%
*V, = map(int, read().split())

# %%


def solve(A, B, C):
    INF = 100
    dp = [INF] * 31
    dp[0] = 0
    for value in [A, B, C]:
        for n in range(31 - value):
            x = dp[n] + 1
            if dp[n + value] > x:
                dp[n + value] = x
    return sum(dp[v] for v in V)


# %%
answer = min(solve(A, B, C) for A, B, C in itertools.combinations(range(1, 31), 3))
print(answer)