#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

const int size = 4;
int waste = 0;

int min(int m, int n)
{
	if (m >= n) return n;
	return m;
}

int minCoin(int amount, int coins[])
{
	int mCoin[100][100];
	for (int i = 0; i <= size; i++)
	{
		for (int j = 0; j <= amount; j++)
		{
			mCoin[i][j] = 0;
		}
	}

	for (int i = 1; i <= size; i++)
	{
		for (int j = 1; j <= amount; j++)
		{
			if (j >= coins[i - 1])
			{
				if (mCoin[i - 1][j] == 0)
				{
					mCoin[i][j] = 1 + mCoin[i][j - coins[i - 1]];
				}
				else
				{
					mCoin[i][j] = min(mCoin[i - 1][j], 1 + mCoin[i][j - coins[i - 1]]);
				}
			}
			else
			{
				mCoin[i][j] = mCoin[i - 1][j];
			}
		}
	}
	return mCoin[size][amount];
}

int main(void)
{
	int coins[size];

	for (int i = 0; i < size; i++)
	{
		waste = scanf("%d", &coins[i]);
	}

	printf("%d", minCoin(11, coins));
	return 0;
}