题解 | 买橘子

n = int(input())
rs = []
for x in range(n//8 + 1):
    for y in range((n-8*x)//6 + 1):
        if x*8 + y*6 == n: 
            r = x+y
            rs.append(r)
if len(rs) == 0: print(-1)
else: print(min(rs))