結果
問題 | No.659 徘徊迷路 |
ユーザー | IL_msta |
提出日時 | 2018-03-02 23:38:20 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 17,685 bytes |
コンパイル時間 | 1,749 ms |
コンパイル使用メモリ | 141,392 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-22 13:07:00 |
合計ジャッジ時間 | 2,493 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 5 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | WA | - |
testcase_04 | AC | 6 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 7 ms
6,940 KB |
testcase_09 | AC | 14 ms
6,944 KB |
testcase_10 | AC | 16 ms
6,940 KB |
testcase_11 | AC | 18 ms
6,944 KB |
testcase_12 | AC | 5 ms
6,940 KB |
testcase_13 | AC | 18 ms
6,940 KB |
testcase_14 | AC | 18 ms
6,944 KB |
testcase_15 | AC | 18 ms
6,940 KB |
testcase_16 | AC | 19 ms
6,940 KB |
ソースコード
#define _USE_MATH_DEFINES #pragma region include #include <iostream> #include <iomanip> #include <stdio.h> #include <sstream> #include <algorithm> #include <iterator> #include <cmath> #include <complex> #include <string> #include <cstring> #include <vector> #include <bitset> #include <queue> #include <set> #include <map> #include <stack> #include <list> #include <ctime> #pragma endregion //#include ///////// #pragma region typedef typedef long long LL; typedef long double LD; typedef unsigned long long ULL; #pragma endregion //typedef ////定数 const int INF = (int)1e9; const LL MOD = (LL)1e9+7; const LL LINF = (LL)4e18+20; const LD PI = acos(-1.0); const double EPS = 1e-9; ///////// using namespace::std; ///////// #pragma region Math #pragma region template<class T> inline T gcd(T a, T b){return b ? gcd(b, a % b) : a;} #pragma endregion // 最大公約数 gcd #pragma region template<class T> inline T lcm(T a, T b){return a / gcd(a, b) * b;} #pragma endregion // 最小公倍数 lcm #pragma region LL powMod(LL num,LL n,LL mod=(LL)MOD){//(num**n)%mod num %= mod;// if( n == 0 ){ return (LL)1; } LL mul = num; LL ans = (LL)1; while(n){ if( n&1 ){ ans = (ans*mul)%mod; } mul = (mul*mul)%mod; n >>= 1; } return ans; } LL mod_inverse(LL num,LL mod=MOD){ return powMod(num,MOD-2,MOD); } #pragma endregion //繰り返し二乗法 powMod #pragma region template<class T> vector<T> getDivisor(T n){ vector<T> v; for(int i=1;i*i<=n;++i){ if( n%i == 0 ){ v.push_back(i); if( i != n/i ){//平方数で重複して数えないように v.push_back(n/i); } } } sort(v.begin(), v.end()); return v; } #pragma endregion //約数列挙 getDivisor(n):O(√n) #pragma endregion //math //Utility:便利な奴 #pragma region template<class T> void UNIQUE(vector<T>& vec){ sort(vec.begin(),vec.end()); vec.erase(unique(vec.begin(),vec.end()),vec.end() ); } #pragma endregion // sort erase unique //////////////////////////////// #pragma region long long bitcount64(long long bits) { bits = (bits & 0x5555555555555555) + (bits >> 1 & 0x5555555555555555); bits = (bits & 0x3333333333333333) + (bits >> 2 & 0x3333333333333333); bits = (bits & 0x0f0f0f0f0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f0f0f0f0f); bits = (bits & 0x00ff00ff00ff00ff) + (bits >> 8 & 0x00ff00ff00ff00ff); bits = (bits & 0x0000ffff0000ffff) + (bits >>16 & 0x0000ffff0000ffff); return (bits & 0x00000000ffffffff) + (bits >>32 & 0x00000000ffffffff); } #pragma endregion //その他 //////////////////////////////// struct edge_base{int to;LL cost;}; edge_base make_edge_base(int to,LL cost){ edge_base ret = {to,cost}; return ret; } #pragma region GRL #pragma region //グラフ template<class T,class EDGE> void dijkstra(int root,int V,vector<T>& dist,vector<int>& prev, vector< vector<EDGE> > G ){ priority_queue<pair<T,int>,vector<pair<T,int> >,greater<pair<T,int> > > que; dist.assign(V,LINF); prev.assign(V,-1); dist[root] = 0; que.push(pair<T,int>(0,root));//距離、頂点番号 while( !que.empty() ){ pair<T,int> p = que.top();que.pop(); int v = p.second; if( dist[v] < p.first ) continue; for(int i=0;i < (int)G[v].size();++i){ EDGE e = G[v][i]; if( dist[e.to] > dist[v] + e.cost ){ dist[e.to] = dist[v] + e.cost; prev[e.to] = v; que.push(pair<T,int>(dist[e.to],e.to)); } } } } //経路復元,dijkstraにprev入れた //http://ronly.hatenablog.com/entry/2017/06/17/161641 vector<int> get_path(vector<int>& prev,int t){ vector<int> path; while(t!=-1){ path.push_back( t ); t = prev[t]; } reverse(path.begin(),path.end()); return path; } #pragma endregion //ダイクストラ法:O(|E|log|V|) #pragma region //グラフ void warshall_floyd(vector<vector<LL> >& dist,int V,const LL inf=LINF){ for(int k=0;k<V;++k){ for(int i=0;i<V;++i){ if( dist[i][k] >= inf ) continue; for(int j=0;j<V;++j){ if( dist[k][j] >= inf )continue; dist[i][j] = min(dist[i][j],dist[i][k]+dist[k][j]); } } } } #pragma endregion //ワーシャルフロイド:O(|V|**3) #pragma region namespace FLOW{ //vector< vector<FLOW:edge> > G; struct edge_flow : public edge_base{ LL cap;//LD cap;// int rev; }; edge_flow make_edge_flow(int to,LL cap,int rev,LL cost=1){ //edge_flow make_edge_flow(int to,LD cap,int rev,LL cost=1){ edge_flow ret; ret.to = to; ret.cost = cost; ret.cap = cap; ret.rev = rev; return ret; } //* class Graph{ public: int V; vector< vector<FLOW::edge_flow> > G; vector< LL > dist; vector< int > iter; vector< bool > used; void init(int v){ V = v; G.resize(V); } void reset(){ iter.assign(V,0); used.assign(V,false); } //directed graph void add_edge(int from,int to,LL cap){ G[from].push_back( FLOW::make_edge_flow(to,cap,G[to].size()) ); G[to].push_back( FLOW::make_edge_flow(from,0,G[from].size()-1) ); } private: //sから最短距離をBFSで計算する void bfs(int s){//許容量もチェックしている queue<int> que; dist = vector<LL>(V,-1); dist[s] = 0; que.push(s); while(!que.empty()){ int v = que.front();que.pop(); for(int i=0;i<(int)G[v].size();++i){ edge_flow &e = G[v][i]; if( e.cap > 0 && dist[e.to] < 0 ){ dist[e.to] = dist[v] + 1; que.push(e.to); } } } } private: //増加パスをDFSで探す LL dfs(int v,int t,LL f){ if( v==t ) return f; for(int &i = iter[v];i<(int)G[v].size();++i){//? FLOW::edge_flow &e = G[v][i]; if( e.cap>0 && dist[v] < dist[e.to]){ LL d = this->dfs(e.to, t, min(f,e.cap) ); if( d > 0){ e.cap -= d; G[e.to][e.rev].cap += d; return d; } } } return 0; } public: //sからtへの最大流量を求める LL max_flow(int s,int t){ LL flow = 0; for(;;){ this->bfs(s); if( dist[t] < 0 ) return flow; iter = vector<int>(V,0); LL f = this->dfs(s,t,LINF); do{ flow += f; f = this->dfs(s,t,LINF); }while( f > 0 ); } } }; //*/ } #pragma endregion //dinic :O(|E||V|^2) #pragma region //グラフ bool is_bipartite(int v,int c,vector< vector<int> >& G,vector<int>& Color){ Color[v] = c; for(int i=0;i < (int)G[v].size();++i){//隣接グラフ if(Color[ G[v][i] ] == c ) return false; if(Color[ G[v][i] ] == 0 && !is_bipartite(G[v][i],-c,G,Color) ){ return false; } } return true; } bool is_bipartite(int Root,vector< vector<int> >& Graph){ int GraphSize = Graph.size(); vector<int> Color(GraphSize,0); const int ColorNo = 1; return is_bipartite(Root,ColorNo,Graph,Color); } #pragma endregion //二部グラフチェック is_bipartite(root,GraphList) #pragma region namespace matching{ //https://beta.atcoder.jp/contests/soundhound2018/tasks/soundhound2018_c int V; //頂点数 vector< vector<int> > G;//グラフ vector<int> match;//match[i]:頂点[i]がどことマッチされているか vector<bool > used;// void add_edge(int u,int v){ G[u].push_back(v); G[v].push_back(u); } bool dfs(int v){ /* https://mathtrain.jp/bipartitematching 未マッチ辺・マッチ辺・未マッチ辺 これを マッチ辺・未マッチ辺・マッチ辺 に変えると 1マッチが2マッチになる。 未[済未] 増加路を求めている。 */ used[v] = true;//dfsのroot前に初期化される int size = G[v].size(); for(int i=0;i<size;++i){ int u = G[v][i];// int w = match[u];// if( w<0 || ((used[w]==false) && dfs(w)) ){ /* マッチングされていない|| 使われてない&& */ match[v] = u; match[u] = v; return true; } } return false; } int bipartite_matching(){ int res = 0; match = vector<int>(V,-1);//未マッチ状態に初期化 for(int v=0;v<V;++v){ if( match[v] < 0 ){ used = vector<bool>(V,false); if( dfs(v) ){ ++res; } } } return res; } } #pragma endregion //二部グラフの最大マッチング bipartite_matching() #pragma endregion // #pragma region vector< vector<LL> > NCK;//初期値:0 //http://sugarknri.hatenablog.com/entry/2016/07/16/165715 void makeinv(vector<LL>& inv,const LL P){ int i; //const int varMAX = max(100000,(int)inv.size()); const int varMAX = max(100010,(int)inv.size()); inv = vector<LL>( varMAX+1,0); inv[1]=1; for(i=2;i<=varMAX;i++){ inv[i] = (inv[P%i] * (P-P/i)%P ) % P;//OVF //inv[i] = powMod(i,P-2,P); } } LL nCk(LL N,LL k,LL mod = MOD){ static vector<LL> inv;//modの逆元 if( inv.size() == 0 ){ makeinv(inv,mod);//modは素数を入れる } k = min(k,N-k); if( k < 0 || k > N){return 0;} if( k == 0 ){return 1;} if( k == 1 ){return N%mod;} LL ret = 1; for(int i=1;i<=k;++i){ ret = (ret * ((N+1-i)%mod) )%mod;//ret*N:OVF ret = (ret * inv[i] )%mod; } return ret; } LL nCk_once(LL N,LL k,LL mod = MOD){//modは素数 k = min(k,N-k); if( k < 0 || k > N ){return 0;} if( k == 0 ){return 1;} if( k == 1 ){return N%mod;} LL ret = 1; LL A=1; for(LL i=0;i<k;++i){ A = (A * ((N-i)%mod) ) % mod; } LL B=1; for(LL i=2;i<=k;++i){ B = (B * (i%mod) ) % mod; } ret = ( A * powMod(B,mod-2,mod) ) % mod; return ret; } #pragma endregion //組み合わせnCk(,10^5) #pragma region LL nCk_base(int N,int K,LL mod=MOD){ if( K<0 || N < K ) return 0;//多く取り過ぎ K = min(K,N-K); if( K==0 ){return 1%mod;} if( K==1 ){return N%mod;}//%MOD; if( N<=10000 && NCK[N][K] ){ return NCK[N][K]; } //N個目を使わない:nCk(N-1,k) //N個目を使う :nCk(N-1,k-1) LL ans = (nCk_base(N-1,K)+nCk_base(N-1,K-1) )%mod;//%MOD; if( N<=10000 ){ NCK[N][K] = ans; } return ans; } #pragma endregion //組み合わせ メモ? #pragma region DSL class UnionFind{ public: int cNum;//要素数 vector<int> parent; vector<int> count; vector< vector<int> > GList; UnionFind(int n){ cNum = n; parent = vector<int>(n); count = vector<int>(n,1); GList.resize(n); for(int i=0;i<n;++i){ parent[i] = i; GList[i].push_back(i); } } int find(int x){ if( parent[x] == x ){return x;} return parent[x] = find( parent[x] ); } bool same(int x,int y){return find(x) == find(y);} int Count(int x){return count[find(x)];} void add(int x,int y){//union x = find(x); y = find(y); if( x==y )return; parent[x] = y; count[y] += count[x]; if( GList[y].size() < GList[x].size() ){ swap(GList[x],GList[y]); } GList[y].insert( GList[y].end(), GList[x].begin(),GList[x].end() ); } }; #pragma endregion //UnionFind #pragma region DSL class BITree{//1-index int N; vector<LL> bit; public: BITree(int n){ N = n; bit = vector<LL>(N+1,0);//1-index } void add(int a,LL w){//aにwを足す if( a <= 0 || N < a) return;//a:[1,N] for(int i=a;i<=N;i += i & -i){ bit[i] += w; } } LL sum(int a){//[1,a]の和,a:[1,N] /* 1番目からa番目までの和、1-index */ LL ret = 0; if( a > N ) a = N; for(int i=a; i > 0; i -= i & -i){ ret += bit[i]; } return ret; } }; #pragma endregion //BIndexTree #pragma region //行列の積 namespace mymat{ LL matMOD = MOD;//初期値10^9 + 7 }; template<class T> vector< vector<T> > operator*( vector<vector<T> >& A,vector< vector<T> >& B){ LL mod = mymat::matMOD; int R = A.size(); int cen = A[0].size(); int C = B[0].size(); vector< vector<T> > ans(R,vector<T>(C,0) ); for(int row=0;row<R;++row){ for(int col=0;col<C;++col){ for(int inner=0;inner< cen;++inner){ /*ans[row][col] = (ans[row][col] + A[row][inner]*B[inner][col])%mod; //ans[row][col] = (ans[row][col] + A[row][inner]*B[inner][col]); ans[row][col] = (ans[row][col] + mod) % mod; //負になるときの処理 */ ans[row][col] = (ans[row][col] + A[row][inner]*B[inner][col])%mod; } } } return ans; } template<class T> vector< vector<T> > powMod(const vector< vector<T> >& mat,LL N,LL mod=MOD){ mymat::matMOD = mod; int R = mat.size(); int C = mat[0].size(); //R==C vector< vector<T> > I(R,vector<T>(C,0));//単位元 for(int i=0;i<R && i<C;++i){ I[i][i] = 1; } if( N == 0 ){ return I; } vector< vector<T> > mul(R,vector<T>(C)),ans(R,vector<T>(C)); ans = I; mul = mat; while(N){ if( N & 1 ){ ans = ans*mul; } N >>= 1; mul = mul*mul; } return ans; } #pragma endregion //行列 #pragma region /* //何かが必要 namespace TIME{ unsigned long long get_cycle(){ return __rdtsc(); } unsigned long long start,limit; void time_start(){ start = get_cycle(); } //あたいをーさぐらないとーだめー //コードテスト void time_set(unsigned long long num){limit = num;} bool check(){return (get_cycle() < start+limit);} } #pragma endregion //時間計測 */ #pragma region /* //#include <random> namespace RAND{ mt19937 mt; void rand_init(){ random_device rnd; mt = mt19937(rnd()); } int rand(){ return mt(); } int rand(int num){//%num int ret = mt(); ret = (ret%num+num)%num; return ret; } } */ #pragma endregion //乱数 #pragma region #pragma endregion // ////////////////// /* template <typename T> class segment_base{ int N;//要素数 vector< T > dat1; T VAL_E;//初期値 public: segment_base(){}; segment_base(int n,T val_E ):N(n),VAL_E(val_E){ dat1.resize(2*n); dat1.assign(2*n,val_E);//初期化 } void init(int n,T val_E){ N = n; VAL_E = val_E; dat1.resize(2*n); dat1.assign(2*n,val_E); } T SELECT(T L,T R){//扱う演算子 T ans; ans = min(L,R);// return ans; } //index番目の値をvalに変更,indexは"0-index" void update(int index,T val){ for(dat1[index+=N] = val;index>1;index>>=1){ dat1[index>>1] = SELECT(dat1[index],dat1[index^1]);//index+0,+1 } } //区間[L,R)のSELECT T query(int L,int R){ T ans = VAL_E;// for(L+=N,R+=N; L<R;L>>=1,R>>=1){ if(L&1) ans = SELECT(ans,dat1[L++]); if(R&1) ans = SELECT(ans,dat1[--R]); } return ans; } }; */ template <typename T> class segment_base{//書き換え int N;//要素数 vector< T > dat1; T VAL_E;//初期値 T VAL_NULL;//空の値 public: segment_base(){}; segment_base(int n,T val_E ):N(n),VAL_E(val_E){ dat1.resize(2*n); dat1.assign(2*n,val_E);//初期化 } void init(int n,T val_E,T val_N){ N = n; VAL_E = val_E; VAL_NULL = val_N; int size = 2; while(size<N){ size <<= 1; } N = size; dat1.resize(2*N); dat1.assign(2*N,val_E); } T SELECT(T& L,T& R){//扱う演算子 T ans; ans = L * R;// return ans; } //index番目の値をvalに変更,indexは"0-index" void update(int i,T& val){ i += N -1 ; dat1[i] = val; while( i > 0 ){ i = (i-1)/2; dat1[i] = dat1[i*2+1] * dat1[i*2+2]; } } //区間[L,R)のSELECT T query(int a,int b,int k,int L,int R){ if(R<=a || b<=L){ return VAL_E;//交差しない } if(a<=L && R<=b && dat1[k] != VAL_NULL){ return dat1[k]; } T res = VAL_E; int mid = (L+R)>>1; if( a < mid ) res = SELECT(res,query(a,b,k*2+1,L,mid) ); if( mid < b ) res = SELECT(res,query(a,b,k*2+2,mid,R) ); return res; } T query(int L,int R){ return query(L,R,0,0,N); } }; ////////////////// int R,C; vector<string> fld; static const int dr[]={0,1,0,-1}; static const int dc[]={1,0,-1,0}; vector< vector<double> > cal(vector<vector<double> > NOW,int T){ vector<vector<double> > ret(R,vector<double>(C,0)); vector< vector< vector< vector<double> > > >MOVE(R, vector<vector<vector<double> > >(C, vector< vector<double> >(R, vector<double>(C,0) ))); vector< vector< vector< vector<double> > > >NEXT; NEXT = MOVE; for(int r=0;r<R;++r){ for(int c=0;c<C;++c){ if( fld[r][c] == '#'){ continue;//壁 } MOVE[r][c][r][c] = 1; } } vector< vector<double> > dirCount(R,vector<double>(C,0)); //from位置 for(int r=0;r<R;++r){for(int c=0;c<C;++c){ //to位置 for(int toR=0;toR<R;++toR){for(int toC=0;toC<C;++toC){ if( MOVE[r][c][toR][toC] ){ for(int k=0;k<4;++k){ int rr = toR + dr[k]; int cc = toC + dc[k]; if(rr<0||R<=rr||cc<0||C<=cc){ continue;//範囲外 } if( fld[rr][cc] == '#'){ continue;//壁 } dirCount[r][c] += 1; } for(int k=0;k<4;++k){ int rr = toR + dr[k]; int cc = toC + dc[k]; if(rr<0||R<=rr||cc<0||C<=cc){ continue;//範囲外 } if( fld[rr][cc] == '#'){ continue;//壁 } NEXT[r][c][rr][cc] += MOVE[r][c][toR][toC]/dirCount[r][c]; } } } } } } MOVE = NEXT; ///////////////////////////// while(T){ if( T&1 ){ vector<vector<double> > temp(R,vector<double>(C,0)); for(int r=0;r<R;++r){ for(int c=0;c<C;++c){ if( NOW[r][c] == 0 ) continue; for(int toR=0;toR<R;++toR){ for(int toC=0;toC<C;++toC){ temp[toR][toC] += MOVE[r][c][toR][toC]*NOW[r][c]; } } } } NOW = temp; } T /= 2; // NEXT = vector< vector< vector< vector<double> > > >(R, vector<vector<vector<double> > >(C, vector< vector<double> >(R, vector<double>(C,0) ))); for(int r=0;r<R;++r){ for(int c=0;c<C;++c){ for(int cR=0;cR<R;++cR){ for(int cC=0;cC<C;++cC){ if( fld[cR][cC] == '#' ){ continue; } for(int toR=0;toR<R;++toR){ for(int toC=0;toC<C;++toC){ NEXT[r][c][toR][toC] += MOVE[r][c][cR][cC]*MOVE[cR][cC][toR][toC]; } } } } } } MOVE = NEXT; } return NOW; } void solve(){ int T; cin>>R>>C>>T; int sR,sC,gR,gC; cin>>sR>>sC>>gR>>gC; fld = vector<string>(R); for(int r=0;r<R;++r){ cin >> fld[r]; } vector<vector<double> > NOW(R,vector<double>(C,0)); NOW[sR][sC] = 1.0; vector< vector<double> > ans = cal(NOW,T); cout << ans[gR][gC] << endl; } #pragma region main signed main(void){ std::cin.tie(0); std::ios::sync_with_stdio(false); std::cout << std::fixed;//小数を10進数表示 cout << setprecision(16);//小数点以下の桁数を指定//coutとcerrで別 solve(); } #pragma endregion //main()