#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int N;
	cin >> N;
	vector A(N, vector<int>(N));
	vector<vector<int>> ev(N);
	vector<int> sum(N);
	REP(i, N) REP(j, N) {
		scanf("%d", &A[i][j]);
		--A[i][j];
		ev[max(i - j, 0)].emplace_back(A[i][j]);
		ev[min(i + j, N - 1)].emplace_back(A[i][j]);
		sum[A[i][j]] += max(i, j);
	}
	vector<int> dif(N, -N), mn(N, INF);
	REP(i, N) {
		REP(j, N) chmin(mn[j], sum[j]);
		for (auto a : ev[i]) ++dif[a];
		REP(j, N) sum[j] += dif[j];
	}
	cout << accumulate(ALL(mn), 0) << endl;
}