Your are given an array of positive integers nums. Count and print the number of (contiguous) subarrays where the product of all the elements in the subarray is less than k. Example 1: Input: nums = [10, 5, 2, 6], k = 100 Output: 8 Explanation: The 8…
Your are given an array of positive integers nums. Count and print the number of (contiguous) subarrays where the product of all the elements in the subarray is less than k. Example 1: Input: nums = [10, 5, 2, 6], k = 100 Output: 8 Explanation: The 8…
Q: A: 1.暴力找所有可能的子数组,n^2个子数组,最长长度n,则n ^3. 2.n^2解法 从1~n-1各起点开始,一直找到结尾,n^2 class Solution { public: int subarraySum(vector<int>& nums, int k) { int res=0; for(int i=0;i<nums.size();++i){ int sum=0; for(int j=i;j<nums.size();++j){ sum+=nums[j]…
560. 和为K的子数组 知识点:数组:前缀和: 题目描述 给定一个整数数组和一个整数 k,你需要找到该数组中和为 k 的连续的子数组的个数. 示例 输入:nums = [1,1,1], k = 2 输出: 2 , [1,1] 与 [1,1] 为两种不同的情况. 解法一:暴力法 直接以每个元素为首开始: class Solution { public int subarraySum(int[] nums, int k) { int sum = 0; int count = 0; for(int…
2018-09-01 23:02:46 问题求解: 问题求解: 最开始的时候,一眼看过去就是一条 dp 嘛,保存每个数字结尾的长度和,最后求和就好,至于长度如何求,本题中需要用滑动窗口来维护. 很好的题目,将滑动窗口算法和动态规划巧妙的结合了起来. public int numSubarrayProductLessThanK(int[] nums, int k) { if (k <= 1) return 0; int res = 0; int begin = 0; int cur = 1; fo…