题解 | 买橘子

from math import inf
import sys
n = int(input())
if n%8 == 0:
    print(n//8)
    sys.exit()
x = n//8
bag_min = inf
for i in range(x+1):
    nn = n - 8*i
    if nn%6 == 0:
        bag_count = i+nn//6
        bag_min = min(bag_min,bag_count)
if bag_min == inf:
    print(-1)
else:
    print(bag_min)