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+ # 数学
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+ - [ 887. 鸡蛋掉落 - 力扣(LeetCode)] ( https://leetcode.cn/problems/super-egg-drop/description/?envType=daily-question&envId=2024-10-14 )
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+ # 逆序对
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+ - [ 3193. 统计逆序对的数目 - 力扣(LeetCode)] ( https://leetcode.cn/problems/count-the-number-of-inversions/description/ )
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+ - [ 1866. 恰有 K 根木棍可以看到的排列数目 - 力扣(LeetCode)] ( https://leetcode.cn/problems/number-of-ways-to-rearrange-sticks-with-k-sticks-visible/description/ )
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+ - [ 903. DI 序列的有效排列 - 力扣(LeetCode)] ( https://leetcode.cn/problems/valid-permutations-for-di-sequence/description/ )
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+ # 选新或者选旧
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+ - [ 920. 播放列表的数量 - 力扣(LeetCode)] ( https://leetcode.cn/problems/number-of-music-playlists/description/ )
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+ # 阶乘分解
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+ - [ 172. 阶乘后的零 - 力扣(LeetCode)] ( https://leetcode.cn/problems/factorial-trailing-zeroes/description/ )
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+ # 并查集
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+ ## 带权并查集
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+ - [ 399. 除法求值] ( https://leetcode.cn/problems/evaluate-division/description/ )
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1 . [ 805. 数组的均值分割] ( https://leetcode.cn/problems/split-array-with-same-average/description/?envType=featured-list&envId=csPrrWuf?envType=featured-list&envId=csPrrWuf )
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### 划分
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[ 2910. 合法分组的最少组数] ( https://leetcode.cn/problems/minimum-number-of-groups-to-create-a-valid-assignment/description/ )
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+ ### 二进制排序
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+ [ 3309. 连接二进制表示可形成的最大数值] ( https://leetcode.cn/problems/maximum-possible-number-by-binary-concatenation/solutions/2940489/fei-bao-li-zuo-fa-onlogn-pai-xu-pythonja-540j/ )
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### 重要公式
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$$ \lceil a / b \rceil = \lfloor (a + b - 1) / b \rfloor $$
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