na982

#include <stdio.h>

int r, c, t;

int map[2][50][50];

int up_y, up_x, down_y, down_x;

const int dy[] = { -1, +1, 0, 0 };
const int dx[] = { 0, 0, -1, +1 };

void spead(int cur) {
	int next = (cur + 1) % 2;
	for (int y = 0; y < r; ++y) {
		for(int x = 0; x < c; ++x) {
			if (map[cur][y][x] == -1) {
				map[next][y][x] = -1;
			}
			else {
				map[next][y][x] = 0;
			}
		}
	}

	for (int y = 0; y < r; ++y) {
		for (int x = 0; x < c; ++x) {
			int val = (map[cur][y][x] / 5);
			int candi = 0;
			for (int dir = 0; dir < 4; ++dir) {
				int ny = y + dy[dir];
				int nx = x + dx[dir];

				if (ny < 0 || ny >= r || nx < 0 || nx >= c) {
					continue;
				}

				if(map[next][ny][nx] != -1) {
					map[next][ny][nx] += val;
					candi += val;
				}
			}

			if (map[next][y][x] != -1) {
				map[next][y][x] += (map[cur][y][x] - candi);
			}
		}
	}
}

void move(int cur) {
	for (int y = up_y - 1; y > 0; --y) {
		map[cur][y][0] = map[cur][y - 1][0];
	}

	for (int x = 0; x < c - 1; ++x) {
		map[cur][0][x] = map[cur][0][x + 1];
	}

	for (int y = 0; y < up_y; ++y) {
		map[cur][y][c - 1] = map[cur][y + 1][c - 1];
	}

	for (int x = c - 1; x > 1; --x) {
		map[cur][up_y][x] = map[cur][up_y][x - 1];
	}
	
	map[cur][up_y][1] = 0;


	for (int y = down_y + 1; y < r; ++y) {
		map[cur][y][0] = map[cur][y + 1][0];
	}

	for (int x = 0; x < c - 1; ++x) {
		map[cur][r - 1][x] = map[cur][r - 1][x + 1];
	}

	for (int y = r - 1; y > down_y; --y) {
		map[cur][y][c - 1] = map[cur][y - 1][c - 1];
	}

	for (int x = c - 1; x > 1; --x) {
		map[cur][down_y][x] = map[cur][down_y][x - 1];
	}

	map[cur][down_y][1] = 0;

}

int main()
{
	up_y = -1;
	scanf("%d %d %d", &r, &c, &t);
	for (int y = 0; y < r; ++y) {
		for (int x = 0; x < c; ++x) {
			scanf("%d", &map[0][y][x]);
			if (map[0][y][x] == -1) {
				if (up_y == -1) {
					up_y = y, up_x = x;
				}
				else {
					down_y = y, down_x = x;
				}
			}
		}
	}

	int cur = 0;
	for (int time = 0; time < t; ++time) {
		spead(cur);
		cur = (cur + 1) % 2;
		move(cur);
	}

	int ret = 0;
	for (int y = 0; y < r; ++y) {
		for (int x = 0; x < c; ++x) {
			if (map[cur][y][x] != -1) {
				ret += map[cur][y][x];
			}
		}
	}

	printf("%d\n", ret);

	return 0;
}