Tontti

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
from sys import stdin
 
def readline():
    return stdin.readline().strip()
 
def get_vars():
    global n, m, x
    row1 = readline().split(' ')
    n = int(row1[0]) # Korkeus
    m = int(row1[1]) # Leveys
    x = int(row1[2]) # Tavoite
get_vars()
 
def isqrt(n):
    x = n
    y = (x + 1) // 2
    while y < x:
        x = y
        y = (x + n // x) // 2
    return x
    
 
def is_star(char):
    return char == '*'
 
 
def run():
    metsa = []
    for i in xrange(n):
        metsa.append(map(is_star, readline()))
    
    vaihtoehtoja = 0
    def calculate_diagonal(dx, dy):
        start = 0
        end = -1
        block = 0
        vaihtoehtoja = 0
        
        end_finished = False
        while True: # Repeat direction swap
            while True: # +end (adds to block)
                end += 1
                if not (dx+end < n and dy+end < m):
                    end_finished = True
                    end -= 1
                    break
                
                # Calculate diff to block
                for x2 in xrange(dx+start, dx+end+1):
                    if metsa[x2][dy+end]:
                        block += 1
                for spot in metsa[dx+end][dy+start:dy+end]:
                    if spot:
                        block += 1
                
                if block == x:
                    vaihtoehtoja += 1
                elif block > x:
                    break
            while True: # +start (substracts from block)
                start += 1
                if start > end:
                    start -= 1
                    break # Reached minimun size
                
                # Calculate diff to block
                for x2 in xrange(dx+start-1, dx+end+1):
                    if metsa[x2][dy+start-1]:
                        block -= 1
                for spot in metsa[dx+start-1][dy+start:dy+end+1]:
                    if spot:
                        block -= 1
                
                
                if block == x:
                    vaihtoehtoja += 1
                elif block < x:
                    break
                
            if end_finished:
                break
        return vaihtoehtoja
    
    # Calculate diagonals starting from the top (topleft corner included)
    for y1 in xrange(m):
        vaihtoehtoja += calculate_diagonal(0, y1)
    # Calculate diagonals starting from the left
    for x1 in xrange(1, n):
        vaihtoehtoja += calculate_diagonal(x1, 0)
    print(vaihtoehtoja)
 
# import profile
# profile.run('run()')
run()

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: 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