N = int(input())
S = [input() for i in range(N)]
ans = 0
t = 0
for i in range(N):
    k = 0
    for c in S[i]:
        if c == ".":
            ans += k
        else:
            k += 1
    if k > N:
        ans += (k - N) * (k - N + 1) // 2
    elif k < N:
        ans += (N - k) * (N - k - 1) // 2
    t += N - k
    ans += abs(t)
print(ans)