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A. The Third Three Number Problem题目链接:[A](https://codeforc.ec/contest/1699/problem/A)题解链接:[A题题解](http://t.csdn.cn/XpOnw)作者:dcy B. Almost Ternary Matri 阅读全文
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A XOR Mixup 题目链接:A 题解by:wlx B Rising Sand 题目链接:B 题解链接:B题题解 题解by:wushi C 3SUM Closure 题目链接:C 题解链接:C题题解 题解by:lyf(题解内含A-D题题解) D Fixed Point Guessing 题目链接 阅读全文
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比赛链接 A. Serval and Bus By 刘鑫龙 B. Serval and Toy Bricks By 陈代睿 C. Serval and Parenthesis Sequence By 李昊坤 D. Serval and Rooted Tree By 王励翔 已更新 BC 题 阅读全文