import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

N = int(input())
A = tuple(tuple(map(int, input().split())) for _ in range(N))
now = [0] * (N + 1)
upper = [0] * (N + 1)
lower = [0] * (N + 1)

for i in range(N):
    for j in range(N):
        now[A[i][j]] += i + j - min(i, j)
        if i > j:
            lower[A[i][j]] += 1
upper[A[0][0]] += 1
cost = now[:]

for n in range(1, N):
    for a in range(1, N + 1):
        now[a] = now[a] + upper[a] - lower[a]
        cost[a] = min(cost[a], now[a])
    for i in range(n + 1):
        upper[A[i][n - i]] += 1
    for i in range(n, N):
        lower[A[i][i - n]] -= 1

print(sum(cost))