import sys
from collections import deque
R, C, T = map(int, sys.stdin.readline().split())
board = [list(map(int, sys.stdin.readline().split())) for _ in range(R)]
air_purifier = list()
# find air purifier
for r in range(R):
for c in range(C):
if board[r][c] == -1:
air_purifier.append((r, c))
# for a given time
directions = ((-1, 0), (0, 1), (1, 0), (0, -1))
for t in range(T):
spread_q = deque()
# for all dust on the map
for r in range(R):
for c in range(C):
if board[r][c] > 0:
spread_amount = board[r][c] // 5
# for all directions
for dr, dc in directions:
next_r = r + dr
next_c = c + dc
# if next block is available
if -1 < next_r < R and -1 < next_c < C:
if board[next_r][next_c] != -1:
board[r][c] -= spread_amount
spread_q.appendleft((next_r, next_c, spread_amount))
# spread dust
while spread_q:
r, c, spread_amount = spread_q.pop()
board[r][c] += spread_amount
# air purifier works counter-clockwise
base_r, base_c = air_purifier[0]
for r in range(base_r - 1, -1, -1):
board[r][base_c] = board[r - 1][base_c]
for c in range(C - 1):
board[0][c] = board[0][c + 1]
for r in range(base_r):
board[r][C - 1] = board[r + 1][C - 1]
for c in range(C - 1, base_c, -1):
if board[base_r][c - 1] == -1:
board[base_r][c] = 0
else:
board[base_r][c] = board[base_r][c - 1]
# air purifier works clockwise
base_r, base_c = air_purifier[1]
for r in range(base_r + 1, R - 1, 1):
board[r][base_c] = board[r + 1][base_c]
for c in range(C - 1):
board[R - 1][c] = board[R - 1][c + 1]
for r in range(R - 1, base_r, -1):
board[r][C - 1] = board[r - 1][C - 1]
for c in range(C - 1, base_c, -1):
if board[base_r][c - 1] == -1:
board[base_r][c] = 0
else:
board[base_r][c] = board[base_r][c - 1]
answer = 0
for r in range(R):
for c in range(C):
if board[r][c] > 0:
answer += board[r][c]
print(answer)
