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初学noip，应该上哪个oj刷题，反馈最好、进步最快？ 作为一名刚刚参加完ccf培训的教师，想听一下最有发言权的noip曾经的获奖学生们、前辈优秀 … 像我这样的菜鸡，oj还是搞过不少的，我给你推荐一下我目前的oj的使用情况 首先我用oj是分成两累的：刷题、比赛 刷题： 焦作一中oj（不对外开放） … 大部分菜鸟问：“自己电脑运行程序没有问题，但oj上却wrong answer”，肯定是只跑过题面给出的样例吧？ 最多自己随便手造一些小数据跑了一下。