#include using namespace std; const int INF = 1 << 30; template istream& operator >> (istream& is, vector& vec) { for(T& x : vec) is >> x; return is; } template ostream& operator << (ostream& os, const vector& vec) { if(vec.empty()) return os; os << vec[0]; for(auto it = vec.begin(); ++it != vec.end(); ) os << ' ' << *it; return os; } template struct segtree { public: segtree() : segtree(0) {} segtree(int n) : segtree(std::vector(n, e())) {} segtree(const std::vector& v) : _n(int(v.size())) { log = ceil_pow2(_n); size = 1 << log; d = std::vector(2 * size, e()); for (int i = 0; i < _n; i++) d[size + i] = v[i]; for (int i = size - 1; i >= 1; i--) { update(i); } } void set(int p, S x) { assert(0 <= p && p < _n); p += size; d[p] = x; for (int i = 1; i <= log; i++) update(p >> i); } S get(int p) { assert(0 <= p && p < _n); return d[p + size]; } const S operator[](int p) const { return get(p); } S operator[](int p) { return get(p); } S prod(int l, int r) { assert(0 <= l && l <= r && r <= _n); S sml = e(), smr = e(); l += size; r += size; while (l < r) { if (l & 1) sml = op(sml, d[l++]); if (r & 1) smr = op(d[--r], smr); l >>= 1; r >>= 1; } return op(sml, smr); } S all_prod() { return d[1]; } template int max_right(int l) { return max_right(l, [](S x) { return f(x); }); } template int max_right(int l, F f) { assert(0 <= l && l <= _n); assert(f(e())); if (l == _n) return _n; l += size; S sm = e(); do { while (l % 2 == 0) l >>= 1; if (!f(op(sm, d[l]))) { while (l < size) { l = (2 * l); if (f(op(sm, d[l]))) { sm = op(sm, d[l]); l++; } } return l - size; } sm = op(sm, d[l]); l++; } while ((l & -l) != l); return _n; } template int min_left(int r) { return min_left(r, [](S x) { return f(x); }); } template int min_left(int r, F f) { assert(0 <= r && r <= _n); assert(f(e())); if (r == 0) return 0; r += size; S sm = e(); do { r--; while (r > 1 && (r % 2)) r >>= 1; if (!f(op(d[r], sm))) { while (r < size) { r = (2 * r + 1); if (f(op(d[r], sm))) { sm = op(d[r], sm); r--; } } return r + 1 - size; } sm = op(d[r], sm); } while ((r & -r) != r); return 0; } private: int _n, size, log; std::vector d; int ceil_pow2(int n) { int x = 0; while ((1U << x) < (unsigned int)(n)) x++; return x; } void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); } }; int op(int lhs, int rhs){ return min(lhs, rhs); } int e(){ return INF; } int main(){ ios::sync_with_stdio(false); cin.tie(0); int h, w; cin >> h >> w; vector A(h); cin >> A; segtree seg(vector(w, 0)); vector b(w), L(w), R(w); for(int y = h - 2; y >= 0; y--){ fill(b.begin(), b.end(), INF); int prv = -1; for(int x = 0; x < w; x++){ if(A[y][x] == '#') prv = x; L[x] = prv + 1; } prv = w; for(int x = w - 1; x >= 0; x--){ if(A[y][x] == '#') prv = x; R[x] = prv; } for(int x = 0; x < w; x++){ if(A[y][x] == '#') continue; int ng = -1, ok = w - 1; while(ng + 1 < ok){ int mid = (ng + ok) / 2; int l = max(L[x], x - mid); int r = min(R[x], x + mid + 1); (seg.prod(l, r) <= mid ? ok : ng) = mid; } b[x] = ok; } seg = segtree(b); } for(auto &&v : b) cout << v << '\n'; }