from copy import deepcopy
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)]

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

ans = imos[0]

for i in range(1, n):
    imos[i] = deepcopy(imos[i - 1])
    for j in range(n):
        for k in range(n):
            if j - i < 0 and abs(j - i) <= k:
                break
            if j - i >= 0 and abs(j - i) < k:
                break
                
            if j - i < 0:
                imos[i][a[j][k] - 1] += 1
                    
            else:
                imos[i][a[j][k] - 1] -= 1
    
    for j in range(n):
        ans[j] = min(imos[i][j], ans[j])  
    
print(sum(ans))