give sorted 0indexed integer array nums1 nums2 integer k return kth 1based small product nums1i nums2j 0 nums1length 0 j nums2length Example 1input nums1 25 nums2 34 k 2output 8explanation the 2 small product nums10 nums20 2 3 6 nums10 nums21 2 4 8the 2nd small product 8example 2input nums1 4203 nums2 24 k 6output 0explanation the 6 small product nums10 nums21 4 4 16 nums10 nums20 4 2 8 nums11 nums21 2 4 8 nums11 nums20 2 2 4 nums12 nums20 0 2 0 nums12 nums21 0 4 0the 6th small product 0example 3input nums1 21012 nums2 31245 k 3output 6explanation the 3 small product nums10 nums24 2 5 10 nums10 nums23 2 4 8 nums14 nums20 2 3 6the 3rd small product 6 Constraints1 nums1length nums2length 5 104105 nums1i nums2j 1051 k nums1length nums2lengthnums1 nums2 sort