这次比赛整体难度不是太高,but本蒟蒻依然不太行QAQ,补题顺序按照难度顺序(大概)
这场比赛好多奇奇怪怪的图片欸
E - 真假签到题
看上去题面很是简洁,但是直接抄函数代码是不行的,注意x范围。
思路: 1e18函数递归必炸,但是可以打表找规律得出,f(x)=x。
AC代码:
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