牛客网编程题——纸牌游戏(很无语的一道题)

以为 是博弈的从两边拿
结果是随便拿
毫无技术含量

n = int(input())
l = [int(val) for val in input().split(' ')]

l = sorted(l,reverse= True)
index = 0
jia = 1
suma = 0
sumb = 0
while index < len(l):
    if jia == 1:
        suma += l[index]
        jia = 0
    else:
        sumb += l[index]
        jia = 1
    index += 1
print(suma - sumb)