結果
問題 | No.813 ユキちゃんの冒険 |
ユーザー | hitonanode |
提出日時 | 2019-04-14 09:19:45 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 4,970 bytes |
コンパイル時間 | 1,960 ms |
コンパイル使用メモリ | 176,000 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-21 08:30:12 |
合計ジャッジ時間 | 2,712 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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 | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 1 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 1 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using lint = long long int; using pint = pair<int, int>; using plint = pair<lint, lint>; struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++) #define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) template<typename T> istream &operator>>(istream &is, vector<T> &vec){ for (auto &v : vec) is >> v; return is; } template<typename T> ostream &operator<<(ostream &os, const vector<T> &vec){ os << "["; for (auto v : vec) os << v << ","; os << "]"; return os; } template<typename T> ostream &operator<<(ostream &os, const deque<T> &vec){ os << "deq["; for (auto v : vec) os << v << ","; os << "]"; return os; } template<typename T> ostream &operator<<(ostream &os, const set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; } template<typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; } template<typename T> ostream &operator<<(ostream &os, const multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; } template<typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; } template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa){ os << "(" << pa.first << "," << pa.second << ")"; return os; } template<typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; } template<typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; } template<typename T> void ndarray(vector<T> &vec, int len) { vec.resize(len); } template<typename T, typename... Args> void ndarray(vector<T> &vec, int len, Args... args) { vec.resize(len); for (auto &v : vec) ndarray(v, args...); } template<typename T> bool mmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; } template<typename T> bool mmin(T &m, const T q) { if (m > q) {m = q; return true;} else return false; } template<typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); } template<typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); } #define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl; #define FI first #define SE second #define ALL(x) (x).begin(), (x).end() #define SZ(x) ((lint)(x).size()) #define POW2(n) (1LL << (n)) // vector<vector<double>> gauss_jordan(vector<vector<double>> mtr, double eps) // { // // Gauss-Jordan elimination 行基本変形のみを用いるガウス消去法 // int H = mtr.size(), W = mtr[0].size(), c = 0; // REP(h, H) // { // if (c == W) break; // int piv = -1; // FOR(j, h, H) if (abs(mtr[j][c]) > eps) // { // if (piv == -1 or abs(mtr[j][c]) > abs(mtr[piv][c])) piv = j; // } // if (piv == -1) { c++; h--; continue; } // swap(mtr[piv], mtr[h]); // if (h != piv) REP(w, W) mtr[piv][w] *= -1; // 行列式符号不変 // double pivinv = 1.0 / mtr[h][c]; // FOR(hh, h + 1, H) IFOR(w, c, W) mtr[hh][w] = mtr[hh][w] - mtr[h][w] * mtr[hh][c] * pivinv; // c++; // } // return mtr; // } vector<vector<double>> matmul(const vector<vector<double>> &A, const vector<vector<double>> &B) { int H = A.size(), W = B[0].size(), K = B.size(); vector<vector<double>> C(H, vector<double>(W)); REP(i, H) REP(j, W) REP(k, K) (C[i][j] += A[i][k] * B[k][j]); return C; } vector<vector<double>> matpower(vector<vector<double>> X, lint n) { vector<vector<double>> res(X.size(), vector<double>(X.size())); REP(i, res.size()) res[i][i] = 1; while (n) { if (n & 1) res = matmul(res, X); X = matmul(X, X); n >>= 1; } return res; } int main() { int N; double p, q; cin >> N >> p >> q; if (q < 1e-10) cout << p << endl; else { vector<vector<double>> mat{{1 / q, -p / q}, {p / q, q - p * p / q}}; vector<vector<double>> acc{{1, 0}, {0, 1}}; REP(_, N) { acc = matmul(mat, acc); double su = 0; for (auto &vec : acc) for (auto &val : vec) su += val; for (auto &vec : acc) for (auto &val : vec) val /= su;; } cout << acc[1][0] / acc[0][0] << endl; } }