player = [('陈珏', 8.9),
             ('虞书欣', 9.1),
             ('安崎', 8.8),
             ('蔡卓宜', 8.7),
             ('上官喜爱', 8.6),
             ('许佳琪', 9.0),
             ('陆柯燃', 8.6),
             ('孔雪儿', 8.5),
             ('王欣宇', 8.6)
             ]
print("排序前排行榜：")
for item in player:
    print(item)
    
player = sorted(player, key=lambda s: s[1], reverse=True)
print("排序后排行榜：")
for item in player:
    print(item)

b = input("请输入选手名：")
c = float(input("请输入评分："))
player.append((b, c))
player = sorted(player, key=lambda s: s[1], reverse=True)
print("排序后评分排行榜：")
for item in player:
    print(item)

e = input("请输入要删除的选手名")
d = float(input("请输入要删除的选手的评分"))
player.pop(player.index((e, d)))
player = sorted(player, key=lambda s: s[1], reverse=True)
print("排序后评分排行榜：")
for item in player:
    print(item)