from copy import deepcopy
# imosじゃない

n = int(input())

a = [list(map(int, input().split())) for i in range(n)]
ans = [0 for i in range(n)]

imos = [[0 for i in range(n)] for i in range(n)]
tmp = [0 for i in range(n)]

for i in range(n):
    for j in range(n):
        imos[0][a[i][j] - 1] += max(i, j)
        if i >= j:
            tmp[a[i][j] - 1] -= 1

ans = imos[0]

# print(tmp)
for i in range(1, n):
    imos[i] = imos[i - 1]
    for j in range(n):
        if j - i + 1 == 0:
            tmp[a[i - 1][0] - 1] += 2

        elif j - i + 1 < 0:
            tmp[a[j][abs(j - i + 1)] - 1] += 1

        else:
            tmp[a[j][abs(j - i + 1)] - 1] += 1
            
    for j in range(n):
        imos[i][j] = tmp[j] + imos[i - 1][j]
            
    for j in range(n):
        ans[j] = min(imos[i][j], ans[j])     

print(sum(ans))