import sys
input = sys.stdin.readline
from itertools import accumulate
n = int(input())
a = [list(map(int,input().split())) for i in range(n)]
ls = [[0 for i in range(n)] for j in range(n)]
cost = 0
for i in range(n):
  for j in range(n):
    x = a[i][j]
    x -= 1
    cost += max(i,j)
    if i>j:
      ls[x][1] += -1
      if i-j+1<n:
        ls[x][i-j+1] += 1
    if i+j<n-1:
      ls[x][i+j+1] += 1
for i in range(n):
  ls[i] = list(accumulate(ls[i]))
  ls[i] = list(accumulate(ls[i]))
for i in range(n):
  cost += min(ls[i])
print(cost)