你家专注什么了？usaco 得大奖的学生真需要自信，天赋，毅力啊！跟全美参赛者竞赛，难度太大了。

来源: Ela 于 2022-09-28 16:42:02 [旧帖] [给我悄悄话] 本文已被阅读：次

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