Tontti

public class TonttiTehtava {
    
    public static void main(String[] args) {
        IO io = new IO();
        int height = io.nextInt();
        int width = io.nextInt();
        int trees = io.nextInt();
        
        String[] rows = new String[height];
        for (int i = 0; i < height; i++) {
            rows[i] = io.next();
        }
        
        int waysOfChoosing = 0;
        for (int sideLength = 1; sideLength <= height; sideLength++) {
            if (sideLength * sideLength < trees) {
                continue;
            }
            boolean flag = true;
            int maxHeight = height - sideLength;
            for (int y = 0; y <= maxHeight; y++) {
                int maxWidth = width - sideLength;
                for (int x = 0; x <= maxWidth; x++) {
                    int treesInSquare = checkSquareForTrees(rows, x, y, sideLength);
                    if (treesInSquare < trees) {
                        flag = false;
                    }
                    if (treesInSquare == trees) {
                        waysOfChoosing++;
                        flag = false;
                    }
                }
            }
            if (flag) {
                break;
            }
        }
        io.println(waysOfChoosing);
        io.close();
    }
    
    public static int checkSquareForTrees(String[] rows, int x, int y, int sideLength) {
        int result = 0;       
        for (int i = 0; i < sideLength; i++) {
            for (int j = 0; j < sideLength; j++) {
                if (rows[i + y].charAt(j + x) == '*') {
                    result++;
                }
            }
        }       
        return result;
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

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