Tontti

import java.util.*;
import java.math.*;

public class Tehtava3 {
	
	public static class Puu {
		int x;
		int y;
		
		public Puu(int _x, int _y) {
			x = _x;
			y = _y;
		}
	}
	
	public static void laskeTavat(int korkeus, int leveys, String[] metsa, int puita) {
		
		int tulos = 0;
		
		int pieninKoko = (int)Math.ceil(Math.sqrt(puita));
		int maksimiKoko = Math.min(korkeus, leveys);
		ArrayList<Puu> puut = new ArrayList<Puu>();
		
		for (int i = 0; i<korkeus; i++) {
			
			for (int j = 0; j<leveys; j++) {
				
				//System.out.println(metsa[i].charAt(j));
				if (metsa[i].charAt(j) == '*') {
					Puu p = new Puu(j, i);
					puut.add(p);
				}
				
			}
			
		}
		
		
		int maara = 0;
		
		for (int i = pieninKoko; i<maksimiKoko; i++) {
			
			for (int j = 0; j<=leveys-i; j++) {
				
				for (int k = 0; k<=korkeus-i; k++) {
					
					if (oikeaMaaraPuita(j, k, i, puita, puut)) {
						//System.out.println("levyeys: " + j +", korkeus: " + k + ", koko: " + i);
						maara++;
					}
					
				}
				
			}
		}
		
		System.out.println(maara);
		
	}
	
	public static boolean oikeaMaaraPuita(int alkux, int alkuy, int koko, int puita, ArrayList<Puu> puut) {
		
		int maara = 0;
		for (Puu puu : puut) {
			if (puu.x >= alkux && puu.x < alkux+koko && puu.y >= alkuy && puu.y < alkuy+koko) {
				maara++;
				//System.out.println(puu.y + ":" + puu.x);
			}
		}
		
		
		return (maara == puita);
	}
	
	public static String[] luoSatunnainen(int leveys, int korkeus) {
		StringBuilder sb;
		String[] metsa = new String[korkeus];
		Random r = new Random();
		for (int i = 0; i<korkeus; i++) {
			sb = new StringBuilder();
			for (int j = 0; j<leveys; j++) {
				int a = r.nextInt(9);
				if (a <= 1)
					sb.append('*');
				else
					sb.append('.');
				
			}
			
			metsa[i] = sb.toString();
		}
		
		return metsa;
	}
	
	
	public static void tulostaMetsa(String[] metsa) {
	
		for (int i = 0; i<metsa.length; i++) {
			for (int j = 0; j<metsa[0].length(); j++) {
				System.out.print(metsa[i].charAt(j) + " | ");
				
			}
			System.out.println();
			System.out.println("------------------------------------------");
		}
	}

	public static void main(String[] args) {
		
		
		//IO io = new IO();
		//int korkeus = io.nextInt();
		//int leveys = io.nextInt();
		//int puita = io.nextInt();
		
		Scanner s = new Scanner(System.in);
		String[] arvot = new String[3];
		int korkeus = 0;
		int leveys = 0;
		int puita = 0;
		
		arvot = s.nextLine().split("\\s+");
		korkeus = Integer.parseInt(arvot[0]);
		leveys = Integer.parseInt(arvot[1]);
		puita = Integer.parseInt(arvot[2]);
		
		
		String[] metsa = new String[korkeus];
		
		for (int i = 0; i<korkeus; i++) {
			metsa[i] = s.nextLine();
		}
		
		

		//metsa[0] = "....";
		//metsa[1] = ".**.";
		//metsa[2] = ".*..";
		//metsa[3] = "...*";
		
		//metsa = luoSatunnainen(leveys, korkeus);
		//tulostaMetsa(metsa);
		
		laskeTavat(korkeus, leveys, metsa, puita);

	}
	

}

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