import sys

sys.setrecursionlimit(10 ** 6)
from itertools import *
from bisect import *
#from math import *
from collections import *
from heapq import *
from random import *
from decimal import *
import numpy as np

int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]

def main():
    vv=LI()
    mx=max(vv)+5
    ans=200
    for a in range(1,mx+1):
        for b in range(a+1, mx + 1):
            for c in range(b+1, mx + 1):
                dp=[200]*(mx+1)
                dp[0]=0
                for i in range(1,mx+1):
                    if i-c>=0:dp[i]=min(dp[i],dp[i-a]+1,dp[i-b]+1,dp[i-c]+1)
                    elif i-b>=0:dp[i]=min(dp[i],dp[i-a]+1,dp[i-b]+1)
                    elif i-a>=0:dp[i]=min(dp[i],dp[i-a]+1)
                cur=sum(dp[v] for v in vv)
                if cur<ans:ans=cur
    print(ans)

main()