Maalaus

input/painting.java:3: error: class Main is public, should be declared in a file named Main.java
public class Main {
       ^
1 error

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int m = sc.nextInt();
        int k = sc.nextInt();
        int q = sc.nextInt();

        int[][] grid = new int[n][m];

        for (int something = 0; something < k; something++) {
            String opType = sc.next();
            int index = sc.nextInt();
            int color = sc.nextInt();

            if (opType.equals("R")) {
                int row = index - 1;
                for (int column = 0; column < m; column++) {
                    grid[row][column] = color;
                }
            }

            if (opType.equals("C")) {
                int column = index - 1;
                for (int row = 0; row < n; row++) {
                    grid[row][column] = color;
                }
            }
        }

        int[] result = new int[q];

        for (int[] listt : grid) {
            for (int element : listt) {
                for (int i = 0; i < q; i++) {
                    if (element == i + 1) {
                        result[element - 1]++;
                    }
                }
            }
        }

        StringBuilder finalResult = new StringBuilder();
        for (int i = 0; i < q; i++) {
            finalResult.append(result[i]);
            if (i < q - 1) finalResult.append(" ");
        }

        System.out.println(finalResult.toString());
        sc.close();
    }
}