ABC-368 C - Triple Attack

def getInt():
    return int(input())
 
 
def getIntList():
    return list(map(int, input().split()))
 
 
def main():
    N = getInt()
    H = getIntList()
 
    T = 0
    for i in range(N):
        d, m = divmod(H[i], 5)
        T += d * 3
        while m > 0:
            T += 1
            m -= 3 if T % 3 == 0 else 1
 
    print(T)
 
 
if __name__ == "__main__":
    main()