Count Unique Colors After Each Ball Coloring Query

bytedance There is a box containing balls labeled with numbers in the range [0, limit], and there are a total of limit + 1 balls. Given queries, which is a list of n x 2 elements where each query [x, y] means marking x balls with color y. You need to return the number of unique colors in all balls after each query. Implement this functionality. Input limit: An integer representing the maximum label of balls queries: A 2D list of size n x 2, indicating the number of balls to be marked and the color. Output An integer list of length n which represents the count of unique colors after each query. Example limit = 5 queries = [[2, 1], [3, 2], [1, 3]] Output [1, 2, 3] Data Constraints 1 <= n <= 1000 0 <= limit <= 1000 0 <= x <= limit 0 <= y <= 1000 Example Input 5 [[2, 1], [3, 2], [1, 3]]