acpc2016day3A.cpp

const int dx[8] = {1, 0, -1, 0, 1, 1, -1, -1};
const int dy[8] = {0, 1, 0, -1, 1, -1, 1, -1};

int H, W;
vector<string> s;

bool inside(int x, int y) {
    return 0 <= x && x < H && 0 <= y && y < W;
}

bool valid(int i, int j) {
    if (i == 0) return false;
    if (s[i][j] != '-') return false;;
    rep(k, 8) {
        int ni = i + dx[k], nj = j + dy[k];
        if (!inside(ni, nj)) continue;
        if (s[ni][nj] == 'x') return false;
        if ((k == 1 || k == 3) && s[ni][nj] == 'o') return false;
    }
    return true;
}

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    cin >> H >> W;
    s.resize(H);
    rep(i, H) cin >> s[i];

    int ans = 0;
    rep(i, H) {
        rep(j, W) {
            ans += valid(i, j);
        }
    }

    cout << ans << endl;
}