import itertools

def main():
    import sys
    V = list(map(int, sys.stdin.readline().split()))
    min_total = float('inf')
    # Generate all combinations of three distinct integers between 1 and 30
    for a, b, c in itertools.combinations(range(1, 31), 3):
        max_target = max(V)
        dp = [float('inf')] * (max_target + 1)
        dp[0] = 0  # Base case: 0 length requires 0 boards
        
        for i in range(max_target + 1):
            if dp[i] == float('inf'):
                continue
            # Try adding each of the three boards
            for delta in (a, b, c):
                next_i = i + delta
                if next_i <= max_target and dp[next_i] > dp[i] + 1:
                    dp[next_i] = dp[i] + 1
        
        # Check if all target values can be achieved
        total = 0
        valid = True
        for v in V:
            if dp[v] == float('inf'):
                valid = False
                break
            total += dp[v]
        
        if valid and total < min_total:
            min_total = total
    
    print(min_total)

if __name__ == "__main__":
    main()