na982

#include <stdio.h>
#include <algorithm>
using namespace std;

int n, ret;
int table[20][20];
int team1[10], team2[10];
int pick[20];

void update() {
	int team1_size = 0, team2_size = 0;
	for (int i = 0; i < n; ++i) {
		if (pick[i] == 0) {
			team1[team1_size++] = i;
		}
		else {
			team2[team2_size++] = i;
		}
	}

	int sum_1 = 0, sum_2 = 0;
	for (int i = 0; i < n / 2; ++i) {
		for (int j = i + 1; j < n / 2; ++j) {
			sum_1 += (table[team1[i]][team1[j]] + table[team1[j]][team1[i]]);
			sum_2 += (table[team2[i]][team2[j]] + table[team2[j]][team2[i]]);
		}
	}
	if (ret > abs(sum_1 - sum_2)) {
		ret = abs(sum_1 - sum_2);
	}
}

void dfs(int cur, int pick_count) {
	if (pick_count == (n / 2)) {
		update();
		return;
	}

	for (int i = cur; i < n; ++i) {
		pick[i] = 1;
		dfs(i + 1, pick_count + 1);
		pick[i] = 0;
	}
}

int main()
{
	scanf("%d", &n);
	for (int y = 0; y < n; ++y) {
		for (int x = 0; x < n; ++x) {
			scanf("%d", &table[y][x]);
		}
	}

	ret = 0x7fffffff;
	dfs(0, 0);
	printf("%d\n", ret);

	return 0;
}