连续子数组和 Continuous Subarray Sum

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连续子数组和 Continuous Subarray Sum

2018-10-03 01:12:42 问题描述: 问题求解: 本题本质上其实是一个preSum问题的变种,每次求preSum % k,并将之保存到map中,如果之后再次得到相同的余数,则表示这两者之间的和是k的整数倍. 需要注意的有两点: 1)map初始化的时候需要加入(0, -1) 2)如果k == 0,那么直接将sum加入到map中即可 public boolean checkSubarraySum(int[] nums, int k) { if (nums.length == 0) re…

[Swift]LeetCode523. 连续的子数组和 | Continuous Subarray Sum

Given a list of non-negative numbers and a target integer k, write a function to check if the array has a continuous subarray of size at least 2 that sums up to the multiple of k, that is, sums up to n*k where n is also an integer. Example 1: Input:…

[Swift]LeetCode209. 长度最小的子数组 | Minimum Size Subarray Sum

Given an array of n positive integers and a positive integer s, find the minimal length of a contiguous subarray of which the sum ≥ s. If there isn't one, return 0 instead. Example: Input: s = 7, nums = [2,3,1,2,4,3] Output: 2 Explanation: the subarr…

lintcode ：continuous subarray sum 连续子数组之和

题目连续子数组求和给定一个整数数组,请找出一个连续子数组,使得该子数组的和最大.输出答案时,请分别返回第一个数字和最后一个数字的值.(如果两个相同的答案,请返回其中任意一个) 样例给定 [-3, 1, 3, -3, 4], 返回[1,4]. 解题法一:直接暴力,时间复杂度O(N2),时间超时 public class Solution { /** * @param A an integer array * @return A list of integers includes the i…

523 Continuous Subarray Sum 非负数组中找到和为K的倍数的连续子数组

非负数组中找到和为K的倍数的连续子数组详见:https://leetcode.com/problems/continuous-subarray-sum/description/ Java实现: 方法一: class Solution { public boolean checkSubarraySum(int[] nums, int k) { for(int i=0;i<nums.length;++i){ int sum=nums[i]; for(int j=i+1;j<nums.length…

Maximum Subarray 连续子数组最大和

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4],the contiguous subarray [4,−1,2,1] has the largest sum = 6. More practice: If you have figur…

【LeetCode】Maximum Product Subarray 求连续子数组使其乘积最大

Add Date 2014-09-23 Maximum Product Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest product. For example, given the array [2,3,-2,4],the contiguous subarray [2,3] has the largest product = …