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![[leetcode] 1524. Number of Sub-arrays With Odd Sum](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ5Mg.jpg "[leetcode] 1524. Number of Sub-arrays With Odd Sum")
[leetcode] 1524. Number of Sub-arrays With Odd Sum
Description Given an array of integers arr. Return the number of sub-arrays with odd sum. As the ans...
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![[leetcode] 1508. Range Sum of Sorted Subarray Sums](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ5MQ.jpg "[leetcode] 1508. Range Sum of Sorted Subarray Sums")
[leetcode] 1508. Range Sum of Sorted Subarray Sums
Description Given the array nums consisting of n positive integers. You computed the sum of all non-...
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![[leetcode] 1442. Count Triplets That Can Form Two Arrays of Equal XOR](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4OQ.jpg "[leetcode] 1442. Count Triplets That Can Form Two Arrays of Equal XOR")
[leetcode] 1442. Count Triplets That Can Form Two Arrays of Equal XOR
Description Given an array of integers arr. We want to select three indices i, j and k where (0 ˂= i...
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![[leetcode] 1450. Number of Students Doing Homework at a Given Time](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4OA.jpg "[leetcode] 1450. Number of Students Doing Homework at a Given Time")
[leetcode] 1450. Number of Students Doing Homework at a Given Time
Description Given two integer arrays startTime and endTime and given an integer queryTime. The ith s...
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![[leetcode] 剑指 Offer 56 - I. 数组中数字出现的次数](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4Ng.jpg "[leetcode] 剑指 Offer 56 - I. 数组中数字出现的次数")
[leetcode] 剑指 Offer 56 - I. 数组中数字出现的次数
Description 一个整型数组 nums 里除两个数字之外，其他数字都出现了两次。请写程序找出这两个只出现一次的数字。要求时间复杂度是O(n)，空间复杂度是O(1)。 示例 1： 输入：nums...
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![[leetcode] 112. 路径总和](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4NQ.jpg "[leetcode] 112. 路径总和")
[leetcode] 112. 路径总和
Description 给定一个二叉树和一个目标和，判断该树中是否存在根节点到叶子节点的路径，这条路径上所有节点值相加等于目标和。 说明: 叶子节点是指没有子节点的节点。 示例: 给定如下二叉树，以及...
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![[leetcode] 1031. Maximum Sum of Two Non-Overlapping Subarrays](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4NA.jpg "[leetcode] 1031. Maximum Sum of Two Non-Overlapping Subarrays")
[leetcode] 1031. Maximum Sum of Two Non-Overlapping Subarrays
Description Given an array A of non-negative integers, return the maximum sum of elements in two non...
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![[leetcode] 1010. Pairs of Songs With Total Durations Divisible by 60](https://www.finclip.com/news/zb_users/cache/ly_autoimg/m/MjQ4Mw.jpg "[leetcode] 1010. Pairs of Songs With Total Durations Divisible by 60")
[leetcode] 1010. Pairs of Songs With Total Durations Divisible by 60
Description In a list of songs, the i-th song has a duration of time[i] seconds. Return the number o...
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