ctf_a_b.py

#! /usr/bin/env python
# -*- coding: utf-8 -*-
 
import os
import sys
 
class Hoge(object):
    
    def __init__(self):
        pass
 
    def func(self):
        '''
        insert your code
        '''
        n = input()
        a = input()
        b = input()
        c = input()
 
        order = list(reversed(sorted([a, b, c])))
 
        count = 0
        time = 0
        for i in range(1001):
            # print count, time
            num = i % 3
            count += order[num]
            time += 1
            if count >= n:
                break
 
        print time
        return None
 
if __name__ == '__main__':
    h = Hoge()
    h.func()