You are given an array of integers arr and an integer target. You have to find two non-overlapping sub-arrays of arr each with a sum equal target. There can be multiple answers so you have to find an answer where the sum of the lengths of the two sub-arrays…

给你一个由 正 整数组成的数组 nums，以及一个 正 整数 k。

You are given an array of positive integers nums, and a positive integer k. You are allowed to perform an operation once on nums, where in each operation you can remove any non-overlapping prefix and suffix from nums such that nums remains non-empty. You…

给你一个由 正整数 组成的数组 nums 和一个 正整数 k。同时给你一个二维数组 queries，其中 queries[i] = [indexi, valuei, starti, xi]。

You are given an array of positive integers nums and a positive integer k. You are also given a 2D array queries, where queries[i] = [indexi, valuei, starti, xi]. You are allowed to perform an operation once on nums, where you can remove any suffix from nums…

给你一个整数数组 nums 和一个整数 x 。每一次操作时，你应当移除数组 nums 最左边或最右边的元素，然后从 x 中减去该元素的值。请注意，需要 修改 数组以供接下来的操作使用。 如果可以将 x 恰好 减到 0 ，返回 最小操作数 ；否则，返回 -1 。   示例 1： 输入：nums = [1,1,4,2,3], x = 5 输出：2 解释：最佳解决方案是移除后两个元素，将 x 减到 0 。 示例 2： 输入：nums = [5,6,7,8,9], x = 4 输出：-1 示例 3： 输入：nums…

You are given an integer array nums and an integer x. In one operation, you can either remove the leftmost or the rightmost element from the array nums and subtract its value from x. Note that this modifies the array for future operations. Return the minimum…

给你一个整数数组 nums 。 返回满足 nums[i] 的数位和（每一位数字相加求和）等于 i 的 最小 下标 i 。 如果不存在满足要求的下标，返回 -1 。   示例 1： 输入：nums = [1,3,2] 输出：2 解释：

You are given an integer array nums. Return the smallest index i such that the sum of the digits of nums[i] is equal to i. If no such index exists, return -1.   Example 1: Input: nums = [1,3,2] Output: 2 Explanation:

给你一个字符串 s ，它包含一些括号对，每个括号中包含一个 非空 的键。