- 需要记录在0 ~ i点(包括nums[i], 以nums[i]结尾)的sum, 坐标型动态规划. 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 ...

// Given an unsorted array arr of size n that contains only non negative integers, find a sub-array (continuous elements) that has sum equal to s. You mainly need to return the left and right ...