/*               ∧∧∩               ( ゚∀゚)/ キタ━━━━━━(゚∀゚)━━━━━━!!!!             ⊂   ノ  ゆっくり見てってね!!!!!!!!              (つ ノ     o          (ノ      \      ☆              |      o           (⌒ ⌒ヽ   /     ☆     \  (´⌒  ⌒  ⌒ヾ   /       ('⌒ ; ⌒   ::⌒  )      (´     )     ::: ) /   ☆─ (´⌒;:    ::⌒`) :;  ) */ #include #include using namespace std; using namespace atcoder; #define rep(i, s, n) for(int i=s; i std::istream &operator>>(std::istream&is,std::vector&v){for(T &in:v){is>>in;}return is;} template std::ostream &operator<<(std::ostream&os,const std::vector&v){for(auto it=std::begin(v);it!=std::end(v);){os<<*it<<((++it)!=std::end(v)?" ":"");}return os;} // 回文かどうかの判定 bool iskaibun(string s){ll k = s.size();rep(i,0,k/2){if(s[i]!=s[k-1-i]){return false;}}return true;} template void chmax(T& a, T b) { if (a < b) a = b; } template void chmin(T& a, T b) { if (a > b) a = b; } // 余りが正になるような割り方 ll floor(ll x, ll m) { ll r = (x % m + m) % m; return (x - r) / m; } #define mod 998244353 using mint = modint998244353; int op(int a, int b) {return max(a, b);} int e() {return 0;} int mapping(int f, int x) {return (f == 1e9 ? x : f);} int composition(int f, int g) {return (f == 1e9 ? g : f);} int id() {return 1e9;} #define int ll signed main() { cin.tie(nullptr); cout << fixed << setprecision(10); ios::sync_with_stdio(false); int h, w;cin >> h >> w; vector a(h); rep(i, 0, h) cin >> a[i]; vector> s(h, vector(w, 0)); rep(i, 0, h) rep(j, 0, w) { if(a[i][j] == 'o') s[i][j] = 1; if(a[i][j] == 'x') s[i][j] = -1; } queue> q; q.push({0, 0, 1}); vector tx = {0, 1}; vector ty = {1, 0}; int ans = 0; while(!q.empty()) { auto z = q.front(); q.pop(); int x = z[0], y = z[1], cnt = z[2]; //cout <= h || ny >= w) continue; if(a[nx][ny] == '#') continue; if(cnt+s[nx][ny] < 0) continue; if(nx == h-1 && ny == w-1) { ans++; continue; } q.push({nx, ny, cnt+s[nx][ny]}); } } cout << ans << endl; }