Baekjoon-17144-미세먼지 안녕!

import sys
input = sys.stdin.readline
R,C,T = map(int,input().split())
board = [list(map(int,input().split())) for _ in range(R)]
condi = []
for i in range(R):
    for j in range(C):
        if board[i][j] == -1:
            condi.append(i)
condi.sort()

for _ in range(T):
    # diffusion
    new_board = [[i for i in line] for line in board]
    for i in range(R):
        for j in range(C):
            if board[i][j] > 0:
                for ni,nj in [[i+1,j],[i,j+1],[i-1,j],[i,j-1]]:
                    if 0<=ni<R and 0<=nj<C and board[ni][nj]!=-1:
                        new_board[ni][nj] += board[i][j]//5
                        new_board[i][j] -= board[i][j]//5

    # conditioning
    for i in reversed(range(1,condi[0])):
        new_board[i][0] = new_board[i-1][0]   
    for i in range(condi[1]+1,R-1):
        new_board[i][0] = new_board[i+1][0]
    for i in range(C-1):
        new_board[0][i] = new_board[0][i+1]
        new_board[-1][i] = new_board[-1][i+1]
    for i in range(condi[0]):
        new_board[i][-1] = new_board[i+1][-1]   
    for i in reversed(range(condi[1]+1,R)):
        new_board[i][-1] = new_board[i-1][-1]
    for i in reversed(range(2,C)):
        new_board[condi[0]][i] = new_board[condi[0]][i-1]
        new_board[condi[1]][i] = new_board[condi[1]][i-1]
    new_board[condi[0]][1] = 0
    new_board[condi[1]][1] = 0

    board = new_board

result = 0
for i in range(R):
    for j in range(C):
        if board[i][j] > 0:
            result += board[i][j]
print(result)