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429 | 429 | | 0028 | [找出字符串中第一个匹配项的下标](https://leetcode.cn/problems/find-the-index-of-the-first-occurrence-in-a-string/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0028.%20%E6%89%BE%E5%87%BA%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%AD%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%8C%B9%E9%85%8D%E9%A1%B9%E7%9A%84%E4%B8%8B%E6%A0%87.md) | 字符串、双指针 | 简单 |
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430 | 430 | | 0459 | [重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0459.%20%E9%87%8D%E5%A4%8D%E7%9A%84%E5%AD%90%E5%AD%97%E7%AC%A6%E4%B8%B2.md) | 字符串、字符串匹配 | 简单 |
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431 | 431 | | 0686 | [重复叠加字符串匹配](https://leetcode.cn/problems/repeated-string-match/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0686.%20%E9%87%8D%E5%A4%8D%E5%8F%A0%E5%8A%A0%E5%AD%97%E7%AC%A6%E4%B8%B2%E5%8C%B9%E9%85%8D.md) | 字符串、字符串匹配 | 中等 |
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| 432 | +| 1668 | 最大重复子字符串 | | | | |
432 | 433 | | 0796 | [旋转字符串](https://leetcode.cn/problems/rotate-string/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0796.%20%E6%97%8B%E8%BD%AC%E5%AD%97%E7%AC%A6%E4%B8%B2.md) | 字符串、字符串匹配 | 简单 |
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433 | 434 | | 1408 | [数组中的字符串匹配](https://leetcode.cn/problems/string-matching-in-an-array/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/1408.%20%E6%95%B0%E7%BB%84%E4%B8%AD%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2%E5%8C%B9%E9%85%8D.md) | 字符串、字符串匹配 | 简单 |
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434 | 435 | | 2156 | [查找给定哈希值的子串](https://leetcode.cn/problems/find-substring-with-given-hash-value/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/2156.%20%E6%9F%A5%E6%89%BE%E7%BB%99%E5%AE%9A%E5%93%88%E5%B8%8C%E5%80%BC%E7%9A%84%E5%AD%90%E4%B8%B2.md) | 字符串、滑动窗口、哈希函数、滚动哈希 | 中等 |
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707 | 708 | | 0204 | [计数质数](https://leetcode.cn/problems/count-primes/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0204.%20%E8%AE%A1%E6%95%B0%E8%B4%A8%E6%95%B0.md) | 数学、哈希表 | 简单 |
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708 | 709 | | 1925 | [统计平方和三元组的数目](https://leetcode.cn/problems/count-square-sum-triples/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/1925.%20%E7%BB%9F%E8%AE%A1%E5%B9%B3%E6%96%B9%E5%92%8C%E4%B8%89%E5%85%83%E7%BB%84%E7%9A%84%E6%95%B0%E7%9B%AE.md) | 数学、枚举 | 简单 |
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709 | 710 | | 1450 | [在既定时间做作业的学生人数](https://leetcode.cn/problems/number-of-students-doing-homework-at-a-given-time/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/1450.%20%E5%9C%A8%E6%97%A2%E5%AE%9A%E6%97%B6%E9%97%B4%E5%81%9A%E4%BD%9C%E4%B8%9A%E7%9A%84%E5%AD%A6%E7%94%9F%E4%BA%BA%E6%95%B0.md) | 数组 | 简单 |
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| 711 | +| 1620 | 网络信号最好的坐标 | | | | |
710 | 712 | | 剑指 Offer 57 - II | [和为s的连续正数序列](https://leetcode.cn/problems/he-wei-sde-lian-xu-zheng-shu-xu-lie-lcof/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/%E5%89%91%E6%8C%87%20Offer%2057%20-%20II.%20%E5%92%8C%E4%B8%BAs%E7%9A%84%E8%BF%9E%E7%BB%AD%E6%AD%A3%E6%95%B0%E5%BA%8F%E5%88%97.md) | 数学、双指针、枚举 | 简单 |
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711 | 713 | | 0078 | [子集](https://leetcode.cn/problems/subsets/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0078.%20%E5%AD%90%E9%9B%86.md) | 位运算、数组、回溯算法 | 中等 |
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712 | 714 | | 0090 | [子集 II](https://leetcode.cn/problems/subsets-ii/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0090.%20%E5%AD%90%E9%9B%86%20II.md) | 位运算、数组、回溯 | 中等 |
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731 | 733 | | 0124 | [二叉树中的最大路径和](https://leetcode.cn/problems/binary-tree-maximum-path-sum/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0124.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E4%B8%AD%E7%9A%84%E6%9C%80%E5%A4%A7%E8%B7%AF%E5%BE%84%E5%92%8C.md) | 树、深度优先搜索、动态规划、二叉树 | 困难 |
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732 | 734 | | 0226 | [翻转二叉树](https://leetcode.cn/problems/invert-binary-tree/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0226.%20%E7%BF%BB%E8%BD%AC%E4%BA%8C%E5%8F%89%E6%A0%91.md) | 树、递归 | 简单 |
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733 | 735 | | 0050 | [Pow(x, n)](https://leetcode.cn/problems/powx-n/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0050.%20Pow%28x%2C%20n%29.md) | 数学、二分查找 | 中等 |
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734 |
| -| 0021 | [合并两个有序链表](https://leetcode.cn/problems/merge-two-sorted-lists/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0021.%20%E5%90%88%E5%B9%B6%E4%B8%A4%E4%B8%AA%E6%9C%89%E5%BA%8F%E9%93%BE%E8%A1%A8.md) | 递归、链表 | 简单 | |
735 | 736 | | 0779 | [第K个语法符号](https://leetcode.cn/problems/k-th-symbol-in-grammar/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0779.%20%E7%AC%ACK%E4%B8%AA%E8%AF%AD%E6%B3%95%E7%AC%A6%E5%8F%B7.md) | 递归 | 中等 |
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736 | 737 | | 0095 | [不同的二叉搜索树 II](https://leetcode.cn/problems/unique-binary-search-trees-ii/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/0095.%20%E4%B8%8D%E5%90%8C%E7%9A%84%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%20II.md) | 树、二叉搜索树、动态规划、回溯、二叉树 | 中等 |
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737 | 738 | | 剑指 Offer 62 | [圆圈中最后剩下的数字](https://leetcode.cn/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof/) | [Python](https://github.com/itcharge/LeetCode-Py/blob/main/Solutions/%E5%89%91%E6%8C%87%20Offer%2062.%20%E5%9C%86%E5%9C%88%E4%B8%AD%E6%9C%80%E5%90%8E%E5%89%A9%E4%B8%8B%E7%9A%84%E6%95%B0%E5%AD%97.md) | 递归、数学 | 简单 |
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