[백준] 17498 폴짝게임

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class B17498 {
	static int N, M, D;
	static long min = Long.MIN_VALUE, max = Long.MIN_VALUE;
	static long[][] arr, dp;
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine());
		
		N = Integer.parseInt(st.nextToken());
		M = Integer.parseInt(st.nextToken());
		D = Integer.parseInt(st.nextToken());
		arr = new long[N][M];
		dp = new long[N][M];
		
		for (int i = 0; i < N; i++) {
			st = new StringTokenizer(br.readLine());
			for (int j = 0; j < M; j++) {
				arr[i][j] = Integer.parseInt(st.nextToken());
			}
		}
		
		for (int i = 1; i < N; i++) {
			Arrays.fill(dp[i], min);
		}
		for(int i=0;i<N;i++) {
			for (int j = 0; j < M; j++) {
				for (int x = i+1; x <= i+D; x++) {
					for (int y = j-D; y <= j+D; y++) {
						if(x<0||y<0||x>=N||y>=M) continue;

						if(Math.abs(x-i) + Math.abs(y-j) <= D) {
							dp[x][y] = Math.max(dp[x][y],dp[i][j] + arr[x][y]*arr[i][j]);
						}
					}
				}
			}
		}
		for (int i = 0; i < M; i++) {
			max = Math.max(max, dp[N-1][i]);
		}
		
		System.out.println(max);
	}

}