#ifdef __LOCAL #include // プリコンパイル済みヘッダ ~/local/include/mytemplate.hpp.gch #else #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #endif using namespace std; // #include // using bint = boost::multiprecision::cpp_int; using int128 = __int128_t; using ll = long long; using vl = vector; using vvl = vector; using vb = vector; using vvb = vector; using vd = vector; using vvd = vector; using vc = vector; using vvc = vector; using pll = pair; #define REP1(i, n) REP3(i, 0, n, 1) #define REP2(i, s, n) REP3(i, s, n, 1) #define REP3(i, s, n, d) for(ll i = (ll)(s); i < (ll)(n); i += (d)) #define REP_OVERLOAD(e1, e2, e3, e4, NAME,...) NAME #define rep(...) REP_OVERLOAD(__VA_ARGS__, REP3, REP2, REP1)(__VA_ARGS__) #define DEP1(i, n) DEP3(i, n, -1, 1) #define DEP2(i, n, s) DEP3(i, n, s, 1) #define DEP3(i, n, s, d) for(ll i = (ll)(n); (ll)(s) < i; i -= (d)) #define DEP_OVERLOAD(e1, e2, e3, e4, NAME,...) NAME #define dep(...) DEP_OVERLOAD(__VA_ARGS__, DEP3, DEP2, DEP1)(__VA_ARGS__) #define fore(e, a) for (auto&& e: (a)) #define len(a) (ll)(a).size() #define all(a) (a).begin(), (a).end() #define rall(a) (a).rbegin(), (a).rend() #define pb push_back #define eb emplace_back #define fi first #define se second #define th third /********* C O N S T A N T **********/ constexpr ll INF = LONG_LONG_MAX / 2 - 10000LL; // 4,611,686,018,427,377,903 ~= 4.6e+18, 19桁 const double PI = acos(-1); /********* P A I R **********/ template inline pair& operator+=(pair& a, const pair b); template inline pair& operator-=(pair& a, const pair b); template inline pair& operator*=(pair& a, const pair b); template inline pair& operator/=(pair& a, const pair b); template inline pair& operator%=(pair& a, const pair b); template inline pair& operator+=(pair& a, const V b); template inline pair& operator-=(pair& a, const V b); template inline pair& operator*=(pair& a, const V b); template inline pair& operator/=(pair& a, const V b); template inline pair& operator%=(pair& a, const V b); template inline pair operator+(pair a, const V& b); template inline pair operator-(pair a, const V& b); template inline pair operator*(pair a, const V& b); template inline pair operator/(pair a, const V& b); template inline pair operator%(pair a, const V& b); template inline pair operator+(pair a); template inline pair operator-(pair a); template istream& operator >>(istream& stream, pair& a); template ostream& operator <<(ostream &stream, const pair& a); /********* V E C T O R **********/ template inline vector& operator+=(vector& a, const vector b); template inline vector& operator-=(vector& a, const vector b); template inline vector& operator*=(vector& a, const vector b); template inline vector& operator/=(vector& a, const vector b); template inline vector& operator%=(vector& a, const vector b); template inline vector& operator+=(vector& a, const U b); template inline vector& operator-=(vector& a, const U b); template inline vector& operator*=(vector& a, const U b); template inline vector& operator/=(vector& a, const U b); template inline vector& operator%=(vector& a, const U b); template inline vector operator+(vector a, const U& b); template inline vector operator-(vector a, const U& b); template inline vector operator*(vector a, const U& b); template inline vector operator/(vector a, const U& b); template inline vector operator%(vector a, const U& b); template inline vector operator+(vector a); template inline vector operator-(vector a); template istream& operator >>(istream& stream, vector& a); template ostream& operator <<(ostream& stream, const vector& v); template ostream& operator <<(ostream& stream, const vector>& vv); template inline T Sum(const vector& v) {return reduce(all(v));} // v.size() == 0 のとき T() を返す template inline T Max(const vector& v) {assert(v.size()); return *max_element(all(v));} template inline T Min(const vector& v) {assert(v.size()); return *min_element(all(v));} template inline ll Argmax(const vector& v) {assert(v.size()); return max_element(all(v)) - v.begin();} template inline ll Argmin(const vector& v) {assert(v.size()); return min_element(all(v)) - v.begin();} template inline bool Contains(const vector& v, const U& a) {return find(all(v), a) != v.end();} template inline void Unique(vector& v) {sort(all(v)); v.erase(unique(all(v)), v.end());} // ソートされたユニーク値のvectorに書き換える, O(NlogN). template vector make_vector(int n, U v) { return vector(n, v); } template auto make_vector(int n, Args... args) {auto val = make_vector(args...); return make_vector(n, move(val));} /********* S E T **********/ template istream& operator >>(istream& stream, set& st); template ostream& operator <<(ostream& stream, const set& st); template inline T Max(const set& st) {assert(st.size()); return *prev(st.end());} template inline T Min(const set& st) {assert(st.size()); return *st.begin();} /********* M U L T I S E T **********/ template istream& operator >>(istream& stream, multiset& st); template ostream& operator <<(ostream& stream, const multiset& st); template inline T Max(const multiset& st) {assert(st.size()); return *prev(st.end());} template inline T Min(const multiset& st) {assert(st.size()); return *st.begin();} template inline bool EraseOne(multiset& st, T x) {auto it=st.find(x); if (it!=st.end()) {st.erase(it); return true;} else return false;} // 要素xを1つ削除. 消せたらtrueを返す. /********* S T R I N G **********/ inline string ToUpper(const string& s) {string t; t.resize(s.size()); std::transform(all(s), t.begin(), ::toupper); return t; } inline string ToLower(const string& s) {string t; t.resize(s.size()); std::transform(all(s), t.begin(), ::tolower); return t; } /********* T R I O **********/ template struct trio { T1 first; T2 second; T3 third; // コンストラクタ・代入演算子 trio() {first=T1(); second=T2(); third=T3();} trio(const T1& x) : first(x), second(x), third(x) {} trio(const T1& x, const T2& y, const T3& z) : first(x), second(y), third(z) {} trio(const trio& t) {first=t.first; second=t.second; third=t.third;} // コピーコンストラクタ trio& operator =(const trio& t) {first=t.first; second=t.second; third=t.third; return *this;} // 比較演算子 auto operator <=>(const trio&) const = default; // 単項演算子（+ -） trio operator +() const { return *this; } trio operator -() const { return (-1) * (*this); } // 複合代入演算子 trio& operator +=(const trio& t) {first += t.first; second += t.second; third += t.third; return *this;} trio& operator -=(const trio& t) {first -= t.first; second -= t.second; third -= t.third; return *this;} trio& operator *=(const trio& t) {first *= t.first; second *= t.second; third *= t.third; return *this;} trio& operator /=(const trio& t) {first /= t.first; second /= t.second; third /= t.third; return *this;} trio& operator %=(const trio& t) {first %= t.first; second %= t.second; third %= t.third; return *this;} // 算術演算子 friend trio operator +(const trio& lhs, const trio& rhs) {return trio(lhs) += rhs;} friend trio operator -(const trio& lhs, const trio& rhs) {return trio(lhs) -= rhs;} friend trio operator *(const trio& lhs, const trio& rhs) {return trio(lhs) *= rhs;} friend trio operator /(const trio& lhs, const trio& rhs) {return trio(lhs) /= rhs;} friend trio operator %(const trio& lhs, const trio& rhs) {return trio(lhs) %= rhs;} // 入出力 friend istream& operator >>(istream &stream, trio& t) {return stream >> t.first >> t.second >> t.third;} friend ostream& operator <<(ostream &stream, const trio& t) {return stream << t.first << " " << t.second << " " << t.third;} operator tuple() {return tie(first, second, third);} }; using tll = trio; /********* R A N D O M **********/ struct Random { mt19937_64 rnd; Random() { random_device seed_gen; rnd.seed(seed_gen()); } ll randint(ll a, ll b) { // [a, b] uniform_int_distribution dist(a, b); return dist(rnd); } double randreal(double a, double b) { uniform_real_distribution dist(a, b); return dist(rnd); } char randchar(char a, char b) { // [a, b] uniform_int_distribution dist(a, b); return dist(rnd); } }; /********* P R I N T **********/ template inline void print(const T& e); template inline void print(const H& h, const T&... t); template inline void End(const T&... t); /********* D E B U G **********/ #ifdef __LOCAL #define debug(...) if(DEBUG) do{cout << '[' << #__VA_ARGS__ << "] ";debug_(__VA_ARGS__);}while(0) #else #define debug(...) #endif void dbg_(const long long& e); template void dbg_(const T& e); template void dbg_(const pair& p); template void dbg_(const trio& t); template void debug_(const T& e); template void debug_(const vector& v); template void debug_(const vector>& vv); template void debug_(const map& mp); template void debug_(const vector>& vm); template void debug_(const set& st); template void debug_(const multiset& st); template void debug_(const vector>& vs); template void debug_(const vector>& vs); template void debug_(const H& h, const T&... t); /********* O T H E R S **********/ template inline bool chmin(T& a, U b) {if (a > b) {a = b; return true;} return false;} // bは値渡し! template inline bool chmax(T& a, U b) {if (a < b) {a = b; return true;} return false;} template inline auto Mod(const T& a, const U& m) {return (a % m + m) % m;} // 負もOK template inline auto Ceil(const T& x, const U& y) {return x < 0 ? x/y : (x + y - 1) / y;} // 負もOK template inline auto Floor(const T& x, const U& y) {return -(Ceil(-x, y)); } // 負もOK inline ll Isqrt(ll n) {assert(n >= 0); ll x = round(sqrt(n)); while(x * x > n) --x; return x;} inline ll Comb(ll n, ll r) {if (r < 0 || n < r) return 0; r = min(r, n - r); ll ret = 1; rep(i, r) {ret *= n - i; ret /= i + 1;} return ret;} // n=60, r=30までOK template inline T Pow(T x, ll n) {assert(n >= 0); T ret = 1; while(1) {if (n % 2) ret *= x; n /= 2; if(!n) return ret; x = x * x;}} // べき乗 mintもOK template inline T Aseries(T a, T d, ll n) {assert(n >= 0); return a * n + n * (n - 1) / 2 * d;} // 等差級数 mintもOK template inline T Gseries(T a, T r, ll n) {assert(n >= 0); if (r == 1) return a * n; else return a * (1 - Pow(r, n)) / (1 - r);} // 等比級数 mintもOK template using min_priority_queue = priority_queue, greater>; inline bool Bit(ll b, int i) {assert(0 <= i && i < 64); return (b >> i) & 1;} inline ll Popcount(ll b) {return __builtin_popcountll(b);} inline ll Mask(ll n) {assert(0 <= n && n < 63); return (1LL << n) - 1LL;} // [0, n)のbitが立った64bit整数を返す。 inline ll Mask(ll n, ll m) {assert(n >= m); return Mask(n) ^ Mask(m);} // [m, n)のbitが立った64bit整数を返す。 /********* M O D **********/ // #include // https://atcoder.github.io/ac-library/production/document_ja/ // using namespace atcoder; // using mint = modint998244353; // modint1000000007; // istream& operator >>(istream& stream, mint& e) {ll n; stream >> n; e = n; return stream; } // ostream& operator <<(ostream& stream, const mint& e) { stream << e.val(); return stream; } // using vm = vector; // using vvm = vector; /***************************************/ constexpr bool DEBUG = true; vvl bfs(const vector &G, pll p) { ll H = len(G); ll W = len(G[0]); vvl dist(H, vl(W, INF)); queue que; dist[p.fi][p.se] = 0; que.push(p); while (!que.empty()) { auto [h, w] = que.front(); que.pop(); vl dh = {-1, +1, 0, 0}; vl dw = {0, 0, -1, +1}; rep(i, 4) { ll h2 = h + dh[i]; ll w2 = w + dw[i]; if (h2 < 0 || H <= h2 || w2 < 0 || W <= w2) continue; if (G[h2][w2] == '#' || dist[h2][w2] != INF) continue; dist[h2][w2] = dist[h][w] + 1; que.push({h2, w2}); } } return dist; } int main() { cin.tie(nullptr); cout << fixed << setprecision(10); ll H, W, K, L, R; cin >> H >> W >> K >> L >> R; vl dh = {1, -1, 0, 0}; vl dw = {0, 0, 1, -1}; string fdir = "DURL"; string rdir = "UDLR"; vector S(H); cin >> S; auto dist1 = bfs(S, {0, 0}); auto dist2 = bfs(S, {H - 1, W - 1}); debug(dist1); debug(dist2); auto f = [&](vvl& dist, ll h, ll w, bool rev=false) -> string { ll p = dist[h][w]; ll porig = p; assert(p != INF); string s = fdir; if (rev) s = rdir; string ret; while(p > 0) { p--; rep(i, 4) { ll h2 = h + dh[i]; ll w2 = w + dw[i]; if (h2 < 0 || h2 >= H || w2 < 0 || w2 >= W) continue; if (dist[h2][w2] != p) continue; else { ret += s[i]; h = h2; w = w2; break; } } } if (rev) reverse(all(ret)); assert(len(ret) == porig); return ret; }; if ((R - L) % 2) { // 偶数回移動 rep(h, H) { rep(w, W) { ll d1 = dist1[h][w]; ll d2 = dist2[h][w]; if (d1 == INF || d2 == INF) continue; if (L - 1 >= d1 && (L - 1 - d1) % 2 == 0 && K - R >= d2 && (K - R - d2) % 2 == 0) { string ans; // 最初の繰り返し rep(j, 4) { ll h2 = 0 + dh[j]; ll w2 = 0 + dw[j]; if (h2 < 0 || h2 >= H || w2 < 0 || w2 >= W) continue; if (dist1[h2][w2] == 1) { rep(i, (L - 1 - d1) / 2) { ans += fdir[j]; ans += rdir[j]; } break; } } assert(len(ans) == L - 1 - d1); // Lまで進む ans += f(dist1, h, w, true); // L-Rの繰り返し bool ok = false; rep(j, 0, 4, 2) { ll h2 = h + dh[j]; ll w2 = w + dw[j]; ll h2r = h + dh[j + 1]; ll w2r = w + dw[j + 1]; if (h2 < 0 || h2 >= H || w2 < 0 || w2 >= W) continue; if (h2r < 0 || h2r >= H || w2r < 0 || w2r >= W) continue; if (dist1[h2][w2] != INF && dist1[h2r][w2r] != INF) { rep(i, (R - L + 1) / 2) { ans += fdir[j]; ans += rdir[j]; } ok = true; break; } } if (!ok) continue; // ゴールまで到達 ans += f(dist2, h, w, false); rep(j, 4) { ll h2 = H - 1 + dh[j]; ll w2 = W - 1 + dw[j]; if (h2 < 0 || h2 >= H || w2 < 0 || w2 >= W) continue; if (dist2[h2][w2] == 1) { rep(i, (K - R - d2) / 2) { ans += fdir[j]; ans += rdir[j]; } break; } } assert(len(ans) == K); print("Yes"); End(ans); } } } } print("No"); } /********* P A I R **********/ template inline pair& operator+=(pair& a, const pair b) {a.fi += b.fi; a.se += b.se; return a;} template inline pair& operator-=(pair& a, const pair b) {a.fi -= b.fi; a.se -= b.se; return a;} template inline pair& operator*=(pair& a, const pair b) {a.fi *= b.fi; a.se *= b.se; return a;} template inline pair& operator/=(pair& a, const pair b) {a.fi /= b.fi; a.se /= b.se; return a;} template inline pair& operator%=(pair& a, const pair b) {a.fi %= b.fi; a.se %= b.se; return a;} template inline pair& operator+=(pair& a, const V b) {a.fi += b; a.se += b; return a;} template inline pair& operator-=(pair& a, const V b) {a.fi -= b; a.se -= b; return a;} template inline pair& operator*=(pair& a, const V b) {a.fi *= b; a.se *= b; return a;} template inline pair& operator/=(pair& a, const V b) {a.fi /= b; a.se /= b; return a;} template inline pair& operator%=(pair& a, const V b) {a.fi %= b; a.se %= b; return a;} template inline pair operator+(pair a, const V& b) {a += b; return a;} template inline pair operator-(pair a, const V& b) {a -= b; return a;} template inline pair operator*(pair a, const V& b) {a *= b; return a;} template inline pair operator/(pair a, const V& b) {a /= b; return a;} template inline pair operator%(pair a, const V& b) {a %= b; return a;} template inline pair operator+(pair a) {return a;} template inline pair operator-(pair a) {return a * (-1);} template istream& operator >>(istream& stream, pair& a) {stream >> a.fi >> a.se; return stream;} template ostream& operator <<(ostream &stream, const pair& a) { stream << a.fi << " " << a.se; return stream; } /********* V E C T O R **********/ template inline vector& operator+=(vector& a, const vector b) {assert(a.size() == b.size()); rep(i, 0, a.size()) a[i] += b[i]; return a;} template inline vector& operator-=(vector& a, const vector b) {assert(a.size() == b.size()); rep(i, 0, a.size()) a[i] -= b[i]; return a;} template inline vector& operator*=(vector& a, const vector b) {assert(a.size() == b.size()); rep(i, 0, a.size()) a[i] *= b[i]; return a;} template inline vector& operator/=(vector& a, const vector b) {assert(a.size() == b.size()); rep(i, 0, a.size()) a[i] /= b[i]; return a;} template inline vector& operator%=(vector& a, const vector b) {assert(a.size() == b.size()); rep(i, 0, a.size()) a[i] %= b[i]; return a;} template inline vector& operator+=(vector& a, const U b) {fore(e, a) e += b; return a;} template inline vector& operator-=(vector& a, const U b) {fore(e, a) e -= b; return a;} template inline vector& operator*=(vector& a, const U b) {fore(e, a) e *= b; return a;} template inline vector& operator/=(vector& a, const U b) {fore(e, a) e /= b; return a;} template inline vector& operator%=(vector& a, const U b) {fore(e, a) e %= b; return a;} template inline vector operator+(vector a, const U& b) {a += b; return a;} template inline vector operator-(vector a, const U& b) {a -= b; return a;} template inline vector operator*(vector a, const U& b) {a *= b; return a;} template inline vector operator/(vector a, const U& b) {a /= b; return a;} template inline vector operator%(vector a, const U& b) {a %= b; return a;} template inline vector operator+(vector a) {return a;} template inline vector operator-(vector a) {return a * (-1);} template istream& operator >>(istream& stream, vector& a) {fore(e, a) stream >> e; return stream;} template ostream& operator <<(ostream& stream, const vector& v) {if(v.size()){stream << v[0]; rep(i, 1, v.size()) cout << " " << v[i];} return stream;} template ostream& operator <<(ostream& stream, const vector>& vv) {if(vv.size()){stream << vv[0]; rep(i, 1, vv.size()) cout << '\n' << vv[i];} return stream;} /********* S E T **********/ template istream& operator >>(istream& stream, set& st) {T e; stream >> e; st.insert(e); return stream;} template ostream& operator <<(ostream& stream, const set& st) {if(st.size()){auto it=st.begin(); stream << *it++; for(; it!=st.end(); it++) cout << " " << *it;} return stream;} /********* M U L T I S E T **********/ template istream& operator >>(istream& stream, multiset& st) {T e; stream >> e; st.insert(e); return stream;} template ostream& operator <<(ostream& stream, const multiset& st) {if(st.size()){auto it=st.begin(); stream << *it++; for(; it!=st.end(); it++) cout << " " << *it;} return stream;} /********* P R I N T **********/ template inline void print(const T& e) {cout << e << '\n';} template inline void print(const H& h, const T&... t) {cout << h << ' '; print(t...);} template inline void End(const T&... t) {print(t...); exit(0);} /********* D E B U G **********/ void dbg_(const long long& e) {if (e == INF) cout << "INF"; else if (e == -INF) cout << "-INF"; else cout << e;} template void dbg_(const T& e) {cout << e;} template void dbg_(const pair& p) {cout << '('; dbg_(p.first); cout << ' '; dbg_(p.second); cout << ')';} template void dbg_(const trio& t) {cout << '('; dbg_(t.first); cout << ' '; dbg_(t.second); cout << ' '; dbg_(t.third); cout << ')';} template void debug_(const T& e) {dbg_(e); cout << '\n';} template void debug_(const vector& v) {if (v.size()){auto it=v.begin(); dbg_(*it++); for(; it!=v.end(); ++it){cout << ' '; dbg_(*it);}} cout << '\n';} template void debug_(const vector>& vv) {cout << '\n'; ll cnt=0; for(auto&& v : vv){cout << cnt++ << ": "; debug_(v);}} template void debug_(const map& mp) {if (mp.size()) {auto it = mp.begin(); dbg_(*it++); for(; it != mp.end(); ++it) {cout << ' '; dbg_(*it);}} cout << '\n';} template void debug_(const vector>& vm){cout << '\n'; ll cnt=0; for(auto&& mp : vm){cout << cnt++ << ": "; debug_(mp);}} template void debug_(const set& st) {if(st.size()){auto it=st.begin(); dbg_(*it++); for(; it!=st.end(); ++it) {cout << ' '; dbg_(*it);}}cout << '\n';} template void debug_(const multiset& st) {if(st.size()) {auto it=st.begin(); dbg_(*it++); for(; it != st.end(); ++it) {cout << ' '; dbg_(*it);}} cout << '\n';} template void debug_(const vector>& vs) {cout << '\n'; ll cnt=0; for(auto&& st : vs){cout << cnt++ << ": "; debug_(st);}} template void debug_(const vector>& vs) {cout << '\n'; ll cnt=0;for(auto&& st : vs){cout << cnt++ << ": "; debug_(st);}} template void debug_(const H& h, const T&... t) {dbg_(h); cout << ", "; debug_(t...);}