N = int(input())
S = [input() for _ in range(N)]

A = []
B = []
for i in range(N):
    for j in range(N*2):
        if S[i][j] == "#":
            A.append(i)
            B.append(j)
B.sort()

ans = 0
for i in range(N*N):
    ans += abs(i//N-A[i])+abs((i//N+N)-B[i])

print(ans)