local mmi, mma = math.min, math.max
local n = io.read("*n")

local imosvel = {}
local imos = {}
local base = {}
for i = 1, n do
  imosvel[i] = {}
  imos[i] = {}
  base[i] = 0
  for j = 1, n do
    imosvel[i][j] = 0
    imos[i][j] = 0
  end
end

for ih = 1, n do
  for jw = 0, n - 1 do
    local a = io.read("*n")
    base[a] = base[a] + jw
    --cost zero space: [ih - jw, ih + jw]
    if ih + jw < n then
      imosvel[a][ih + jw + 1] = imosvel[a][ih + jw + 1] + 1
    end
    if 1 < ih - jw then
      imos[a][1] = imos[a][1] + ih - jw
      imosvel[a][1] = imosvel[a][1] - 1
      if ih - jw + 1 <= n then
        imosvel[a][ih - jw + 1] = imosvel[a][ih - jw + 1] + 1
      end
    end
  end
end
local tot = 0
for i = 1, n do
  imos[i][1] = imos[i][1] + imosvel[i][1]
  local cand = imos[i][1]
  for j = 2, n do
    imosvel[i][j] = imosvel[i][j] + imosvel[i][j - 1]
    imos[i][j] = imos[i][j] + imos[i][j - 1] + imosvel[i][j]
    cand = mmi(cand, imos[i][j])
  end
  tot = tot + base[i] + cand
end
print(tot)