Tontti

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/**
 *
 * @author alexey
 */
import java.util.*;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.StringTokenizer;

public class Datatahti20163 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
       
        
        IO io = new IO(); 
        int h = io.nextInt();
        int w = io.nextInt();
        int t = io.nextInt();
        int min=Math.min(h, w);
        int[][] forest=new int[h][w];
        int[][] sqw= new int[w+2][h+2];
        int[][] sqh= new int[h+2][w+2];

        int answer=0;
        boolean stop = false;

        
       
        
        int iq=0;
        
        while(iq<h) {
            String newline = io.next();
            for (int j = 0; j < w; j++) {
                if (newline.charAt(j) == '*') {
                    forest[iq][j]=1;
                } else {
                    forest[iq][j]=0;
                }
            }
            iq++;
        }
        
        for (int i = 0; i < w; i++) {
            sqw[i][0]=forest[0][i];
        }
        for (int i = 1; i < h; i++) {
            sqh[i][0]=forest[i][0];
        }
        
        if(t==1){
          for (int i = 0; i < w; i++) {
            
            for (int j = 0; j < h; j++) {
                
            answer+=forest[j][i];
            } 
        }
         
        }
        
     int x,y,z,a;  
        for (int i = 1; i < min; i++) {
            
            for (int j = i ; j < w; j++) {
                
               
                x=sqw[j-i][0]; 
                
               a=forest[i][j];
                
                for (int k = 1; k < i+1; k++) {
                    a+=forest[i-k][j]+forest[i][j-k];
                    y=x;
                    x=sqw[j-i][k];
                    sqw[j-i][k]=y+a;
                    if(y+a==t){
                        answer++;
                        
                    }
                }
               sqw[j-i][0]=forest[i][j];
            }
            for (int j = i+1; j < h; j++) {
                
                
                x=sqh[j-i][0]; 
                
               a=forest[j][i];
                for (int k = 1; k < i+1; k++) {
                    a+=forest[j][i-k]+forest[j-k][i];
                    y=x;
                    x=sqh[j-i][k];
                    sqh[j-i][k]=y+a;
                    if(y+a==t){
                        answer++;
                        
                    }
                }
           sqh[j-i][0]=forest[j][i];
            }
            int g=0;
        }









        io.println(answer);
        io.close();
    }
    static class IO extends PrintWriter {
	private BufferedReader r;
	private StringTokenizer s;
	
	public IO() {
		super(new BufferedOutputStream(System.out));
		r = new BufferedReader(new InputStreamReader(System.in));
	}
	
	public String nextLine() {
		String s = null;
		try {
			s = r.readLine();
		} catch (Exception e) {}
		if(s == null) throw new NoSuchElementException();
		return s;
	}
	
	public String next() {
		while (s == null || !s.hasMoreElements()) {
			s = new StringTokenizer(nextLine());
		}
		return s.nextToken();
	}
        public int nextInt() {
		return Integer.parseInt(next());
	}
}
}

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: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

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