import numpy as np
N = int(input())
A_list = [list(map(int, input().split())) for i in range(N)]


upper_count = np.array([0 for i in range(N)])
for i in range(N):
    for j in range(N):
        upper_count[A_list[i][j] - 1] += i if i > j else j

add_list = np.array([np.array([0 for i in range(N)]) for j in range(N - 1)])
minus_list = np.array([np.array([0 for i in range(N)]) for j in range(N - 1)])

for i in range(0, N - 1):
    for j in range(i + 1):
        add_list[i][A_list[i - j][j] - 1] += 1
        minus_list[-(i + 1)][A_list[N - 1 - (i - j)][j] - 1] += 1
    if i != 0:
        add_list[i] = add_list[i - 1] + add_list[i]
        minus_list[-(i + 1)] = minus_list[-i] + minus_list[-(i + 1)]


for i in range(len(minus_list) - 1):
    add_list[i + 1] += add_list[i]
    minus_list[i + 1] += minus_list[i]


result_list = add_list - minus_list

min_list = np.amin(result_list, axis=0)
min_list = np.vectorize(lambda a: a if a < 0 else 0)(min_list)
print(np.sum(upper_count) + np.sum(min_list))