結果
問題 | No.659 徘徊迷路 |
ユーザー | Haar |
提出日時 | 2019-09-01 05:44:14 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 63 ms / 2,000 ms |
コード長 | 5,538 bytes |
コンパイル時間 | 2,145 ms |
コンパイル使用メモリ | 215,720 KB |
実行使用メモリ | 5,632 KB |
最終ジャッジ日時 | 2024-05-05 10:09:11 |
合計ジャッジ時間 | 3,480 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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
5,248 KB |
testcase_01 | AC | 12 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 18 ms
5,376 KB |
testcase_05 | AC | 3 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 21 ms
5,376 KB |
testcase_09 | AC | 53 ms
5,632 KB |
testcase_10 | AC | 62 ms
5,632 KB |
testcase_11 | AC | 63 ms
5,504 KB |
testcase_12 | AC | 10 ms
5,376 KB |
testcase_13 | AC | 52 ms
5,632 KB |
testcase_14 | AC | 49 ms
5,632 KB |
testcase_15 | AC | 60 ms
5,504 KB |
testcase_16 | AC | 61 ms
5,632 KB |
ソースコード
#include <bits/stdc++.h> #define LLI long long int #define FOR(v, a, b) for(LLI v = (a); v < (b); ++v) #define FORE(v, a, b) for(LLI v = (a); v <= (b); ++v) #define REP(v, n) FOR(v, 0, n) #define REPE(v, n) FORE(v, 0, n) #define REV(v, a, b) for(LLI v = (a); v >= (b); --v) #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it) #define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it) #define EXIST(c,x) ((c).find(x) != (c).end()) #define fst first #define snd second #define popcount __builtin_popcount #define UNIQ(v) (v).erase(unique(ALL(v)), (v).end()) #define bit(i) (1LL<<(i)) #ifdef DEBUG #include <misc/C++/Debug.cpp> #else #define dump(...) ((void)0) #endif #define gcd __gcd using namespace std; template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;} template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;} template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;} template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);} template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);} template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);} struct Init{ Init(){ cin.tie(0); ios::sync_with_stdio(false); } }init; template <typename T> struct SquareMatrix{ int N; vector<vector<T>> matrix; SquareMatrix(int N): N(N), matrix(N, vector<T>(N)){} SquareMatrix(int N, const T &val): N(N), matrix(N, vector<T>(N, val)){} SquareMatrix(const vector<vector<T>> &matrix): N(matrix.size()), matrix(matrix){} SquareMatrix(const SquareMatrix<T> &) = default; SquareMatrix(SquareMatrix<T> &&) = default; SquareMatrix(initializer_list<initializer_list<T>> list): N(list.size()), matrix(N, vector<T>(N)){ int i = 0; ITR(it1,list){ int j = 0; ITR(it2,*it1){ matrix[i][j] = *it2; ++j; } ++i; } } SquareMatrix& operator+=(const SquareMatrix &val){ REP(i,N) REP(j,N) matrix[i][j] = matrix[i][j] + val[i][j]; return *this; } SquareMatrix& operator-=(const SquareMatrix &val){ REP(i,N) REP(j,N) matrix[i][j] = matrix[i][j] - val[i][j]; return *this; } SquareMatrix& operator*=(const SquareMatrix &val){ vector<vector<T>> temp(N, vector<T>(N)); REP(i,N) REP(j,N) REP(k,N) temp[i][j] = temp[i][j] + matrix[i][k] * val[k][j]; swap(matrix, temp); return *this; } inline const vector<T>& operator[](size_t i) const {return matrix[i];} inline vector<T>& operator[](size_t i){return matrix[i];} inline int size() const {return N;} static SquareMatrix<T> make_unit(int N){ SquareMatrix<T> ret(N); REP(i,N) ret[i][i] = 1; return ret; } SquareMatrix<T> transpose(){ SquareMatrix<T> ret(N); REP(i,N) REP(j,N) ret[i][j] = matrix[j][i]; return ret; } T determinant(){ int s = 0; REP(i,N){ if(matrix[i][i] == 0){ FOR(j,i+1,N){ if(matrix[j][i] != 0){ matrix[i].swap(matrix[j]); (s += 1) %= 2; break; } if(j == N-1) return 0; } } FOR(j,i+1,N){ T t = matrix[j][i] / matrix[i][i]; REP(k,N) matrix[j][k] -= matrix[i][k] * t; } } T ret = s ? -1 : 1; REP(i,N) ret *= matrix[i][i]; return ret; } void show(int w = 10){ REP(i,N){ cerr << (i==0 ? "⎛" : (i==N-1 ? "⎝" : "⎜")); REP(j,N) cerr << setw(w) << matrix[i][j] << " "; cerr << (i==0 ? "⎞" : (i==N-1 ? "⎠" : "⎟")); cerr << endl; } } }; template <typename T> SquareMatrix<T> operator+(const SquareMatrix<T> &a, const SquareMatrix<T> &b){auto ret = a; ret += b; return ret;} template <typename T> SquareMatrix<T> operator-(const SquareMatrix<T> &a, const SquareMatrix<T> &b){auto ret = a; ret -= b; return ret;} template <typename T> SquareMatrix<T> operator*(const SquareMatrix<T> &a, const SquareMatrix<T> &b){auto ret = a; ret *= b; return ret;} template <typename T> SquareMatrix<T> power(SquareMatrix<T> a, uint64_t p){ int N = a.size(); if(p == 0) return SquareMatrix<T>::make_unit(N); if(p == 1) return a; SquareMatrix<T> temp = power(a, p/2); auto ret = temp * temp; if(p%2) ret *= a; return ret; } constexpr pair<int,int> dir4[4] = {{0,1}, {0,-1}, {1,0}, {-1,0}}; int main(){ int R,C,T; int sy,sx,gy,gx; while(cin >> R >> C >> T >> sy >> sx >> gy >> gx){ vector<string> b(R); cin >> b; vector<vector<int>> index(R, vector<int>(C)); { int k = 0; REP(i,R) REP(j,C) index[i][j] = k++; } SquareMatrix<double> m(R*C); REP(i,R){ REP(j,C){ if(b[i][j] == '.'){ int s = index[i][j]; int p = 0; for(auto &[y,x] : dir4){ if(b[i+y][j+x] == '.'){ p += 1; } } if(p == 0){ m[s][s] = 1; }else{ for(auto &[y,x] : dir4){ if(b[i+y][j+x] == '.'){ int t = index[i+y][j+x]; m[t][s] = 1.0 / p; } } } } } } auto p = power(m,T); double ans = p[index[gy][gx]][index[sy][sx]]; cout << fixed << setprecision(12) << ans << endl; } return 0; }