Tontti

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
from sys import stdin
 
#Nope
 
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):
        vaihtoehtoja = 0
        
        end_finished = False
        endblock = 0
        if metsa[dx][dy]:
            endblock += 1
        maxend = min(n-dx, m-dy)
        for end in xrange(maxend):
            startblock = endblock
            if end < maxend-1:
                for x1 in xrange(dx, dx+end+2):
                    if metsa[x1][dy+end+1]:
                        endblock += 1
                for y1 in xrange(dy, dy+end+1):
                    if metsa[dx+end+1][y1]:
                        endblock += 1
            for start in xrange(end+1):
                if startblock == x:
                    vaihtoehtoja += 1
                elif startblock < x:
                    break
                if start < end:
                    # Prepare for next start
                    # Horiz bar
                    for x1 in xrange(dx+start, dx+end+1):
                        if metsa[x1][dy+start]:
                            startblock -= 1
                    # Vert bar
                    for y1 in xrange(dy+start+1, dy+end+1):
                        if metsa[dx+start][y1]:
                            startblock -= 1
        
        
        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: 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