import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[][] d = new int[n][n];
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < n; j++) {
				d[i][j] = sc.nextInt();
			}
		}
		sc.close();

		int inf = 1000000000;
		int n2 = 1 << n;
		int[][] dp = new int[n2][n];
		int[][] dp2 = new int[n2][n];
		for (int i = 0; i < n2; i++) {
			Arrays.fill(dp[i], inf);
			Arrays.fill(dp2[i], inf);
		}
		dp[1][0] = 0;
		dp2[1][0] = 0;
		for (int i = 1; i < n2; i++) {
			for (int j = 0; j < n; j++) {
				if ((i >> j & 1) == 1 && dp[i][j] < inf) {
					for (int j2 = 0; j2 < n; j2++) {
						if ((i >> j2 & 1) == 0) {
							int ni = i | (1 << j2);
							dp[ni][j2] = Math.min(dp[ni][j2], dp[i][j] + d[j][j2]);
							dp2[ni][j2] = Math.min(dp2[ni][j2], dp2[i][j] + dp[ni][j2]);
						}
					}
				}
			}
		}
		int ans = inf;
		for (int i = 0; i < n; i++) {
			ans = Math.min(ans, dp2[n2 - 1][i]);
		}
		System.out.println(ans);
	}
}