Tontti

import java.util.Scanner;

public class TonttiTehtava {
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int height = scanner.nextInt();
        int width = scanner.nextInt();
        int trees = scanner.nextInt();
        
        String[] rows = new String[height];
        for (int i = 0; i < height; i++) {
            rows[i] = scanner.next();
        }
        
        int waysOfChoosing = 0;
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
                if (rows[i].charAt(j) == '*') {
                    waysOfChoosing += checkPossibleSquares(rows, j, i, trees);
                }
            }
        }
        System.out.println(waysOfChoosing);
    }   
    
    public static int checkSquareForTrees(String[] rows, int x, int y, int size, int anchorOffset) {
        int result = 0;       
        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++) {
                if (rows[i + y].charAt(j + x - anchorOffset) == '*') {
                    result++;
                }
            }
        }       
        return result;
    }
    
    public static int checkPossibleSquares(String[] rows, int x, int y, int trees) {
        int result = 0; 
        for (int i = 1; i <= rows.length - y; i++) { // loop through all possible sizes           
            int firstAO = 0;
            if (rows[0].length() - x - i < 0) {
                firstAO = (x + i - rows[0].length());
            }          
            int lastAO = i - 1;
            if (x < i) {
                lastAO = x;
            }
            for (int j = 1; j <= x; j++) {
                if (rows[y].charAt(x - j) == '*') {
                    lastAO = j - 1;
                    break;
                }
            }          
            for (int j = firstAO; j <= lastAO; j++) { // loop through all possible anchor offsets
                if (checkSquareForTrees(rows, x, y, i, j) == trees) {
                    result++;
                    // System.out.println(x + ", " + y + ", " + i + ", " + j);
                }
            }        
        }
        return result;
    }
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED