kth-smallest-element-in-a-sorted-matrix.md

Code

func kthSmallest(matrix [][]int, k int) int {
	singleRow := []int{}
	for _, row := range matrix {
		singleRow = append(singleRow, row...)
	}

	sort.Ints(singleRow)
	return singleRow[k-1]
}

Solution in mind

• Flatten the matrix into a single row.

• Sort the single row and return the kth element.