結果
問題 | No.1688 Veterinarian |
ユーザー | mai |
提出日時 | 2021-09-24 22:22:50 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 109 ms / 3,000 ms |
コード長 | 6,186 bytes |
コンパイル時間 | 2,915 ms |
コンパイル使用メモリ | 212,936 KB |
実行使用メモリ | 55,120 KB |
最終ジャッジ日時 | 2024-07-05 10:52:06 |
合計ジャッジ時間 | 3,998 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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
6,816 KB |
testcase_01 | AC | 3 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 3 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 3 ms
6,940 KB |
testcase_07 | AC | 5 ms
6,940 KB |
testcase_08 | AC | 108 ms
55,120 KB |
testcase_09 | AC | 109 ms
52,736 KB |
testcase_10 | AC | 15 ms
11,520 KB |
testcase_11 | AC | 13 ms
9,216 KB |
testcase_12 | AC | 3 ms
6,944 KB |
testcase_13 | AC | 5 ms
6,944 KB |
testcase_14 | AC | 4 ms
6,944 KB |
testcase_15 | AC | 9 ms
8,064 KB |
testcase_16 | AC | 2 ms
6,944 KB |
ソースコード
#pragma GCC optimize ("O3") #include <bits/stdc++.h> // clang-format off using namespace std; using ll = long long int; #define all(v) (v).begin(),(v).end() #define repeat(cnt,l) for(typename remove_const<typename remove_reference<decltype(l)>::type>::type cnt={};(cnt)<(l);++(cnt)) #define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt)) #define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt)) #define increase(cnt,b,e) for(auto cnt=(b);(cnt)<(e);++(cnt)) #define decrease(cnt,b,e) for(auto cnt=(b);(e)<=(cnt);--(cnt)) const long long MD = 1000000007; const long double PI = 3.1415926535897932384626433832795L; template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')'; return o; } template<typename T> inline T& chmax(T& to, const T& val) { return to = max(to, val); } template<typename T> inline T& chmin(T& to, const T& val) { return to = min(to, val); } void bye(string s, int code = 0) { cout << s << endl; exit(code); } mt19937_64 randdev(8901016); template<typename T, typename Random = decltype(randdev), typename enable_if<is_integral<T>::value>::type* = nullptr> inline T rand(T l, T h, Random& rand = randdev) { return uniform_int_distribution<T>(l, h)(rand); } template<typename T, typename Random = decltype(randdev), typename enable_if<is_floating_point<T>::value>::type* = nullptr> inline T rand(T l, T h, Random& rand = randdev) { return uniform_real_distribution<T>(l, h)(rand); }template<typename T> static ostream& operator<<(ostream& o, const std::vector<T>& v) { o << "[ "; for(const auto& e : v) o<<e<<' '; return o << ']'; } template <typename I> struct MyRangeFormat{ I b,e; MyRangeFormat(I _b, I _e):b(_b),e(_e){} }; template<typename I> static ostream& operator<<(ostream& o, const MyRangeFormat<I>& f) { o << "[ "; iterate(i,f.b,f.e) o<<*i<<' '; return o << ']'; } template <typename I> struct MyMatrixFormat{ const I& p; long long n, m; MyMatrixFormat(const I& _p, long long _n, long long _m):p(_p),n(_n),m(_m){} }; template<typename I> static ostream& operator<<(ostream& o, const MyMatrixFormat<I>& f) { o<<'\n'; repeat(i,(f.n)) { repeat(j,f.m) o<<f.p[i][j]<<' '; o<<'\n'; } return o; } struct LOG_t { ~LOG_t() { cout << endl; } }; #define LOG (LOG_t(),cout<<'L'<<__LINE__<<": ") #define FMTA(m,w) (MyRangeFormat<decltype(m+0)>(m,m+w)) #define FMTR(b,e) (MyRangeFormat<decltype(e)>(b,e)) #define FMTV(v) FMTR(v.begin(),v.end()) #define FMTM(m,h,w) (MyMatrixFormat<decltype(m+0)>(m,h,w)) #if defined(_WIN32) || defined(_WIN64) #define getc_x _getc_nolock #define putc_x _putc_nolock #elif defined(__GNUC__) #define getc_x getc_unlocked #define putc_x putc_unlocked #else #define getc_x getc #define putc_x putc #endif class MaiScanner { FILE* fp_; constexpr bool isvisiblechar(char c) noexcept { return (0x21<=(c)&&(c)<=0x7E); } public: inline MaiScanner(FILE* fp):fp_(fp){} template<typename T> void input_integer(T& var) noexcept { var = 0; T sign = 1; int cc = getc_x(fp_); for (; cc < '0' || '9' < cc; cc = getc_x(fp_)) if (cc == '-') sign = -1; for (; '0' <= cc && cc <= '9'; cc = getc_x(fp_)) var = (var << 3) + (var << 1) + cc - '0'; var = var * sign; } inline int c() noexcept { return getc_x(fp_); } template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr> inline MaiScanner& operator>>(T& var) noexcept { input_integer<T>(var); return *this; } inline MaiScanner& operator>>(string& var) { int cc = getc_x(fp_); for (; !isvisiblechar(cc); cc = getc_x(fp_)); for (; isvisiblechar(cc); cc = getc_x(fp_)) var.push_back(cc); return *this; } template<typename IT> inline void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; } }; class MaiPrinter { FILE* fp_; public: inline MaiPrinter(FILE* fp):fp_(fp){} template<typename T> void output_integer(T var) noexcept { if (var == 0) { putc_x('0', fp_); return; } if (var < 0) putc_x('-', fp_), var = -var; char stack[32]; int stack_p = 0; while (var) stack[stack_p++] = '0' + (var % 10), var /= 10; while (stack_p) putc_x(stack[--stack_p], fp_); } inline MaiPrinter& operator<<(char c) noexcept { putc_x(c, fp_); return *this; } template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr> inline MaiPrinter& operator<<(T var) noexcept { output_integer<T>(var); return *this; } inline MaiPrinter& operator<<(const char* str_p) noexcept { while (*str_p) putc_x(*(str_p++), fp_); return *this; } inline MaiPrinter& operator<<(const string& str) { const char* p = str.c_str(); const char* l = p + str.size(); while (p < l) putc_x(*p++, fp_); return *this; } template<typename IT> void join(IT begin, IT end, char sep = ' ') { for (bool b = 0; begin != end; ++begin, b = 1) b ? *this << sep << *begin : *this << *begin; } }; MaiScanner scanner(stdin); MaiPrinter printer(stdout); // clang-format on // int A, B, C, N; double dp[51][51][51][51]; // int main() { scanner >> A >> B >> C >> N; dp[0][A][B][C] = 1; repeat(i, N) { iterate(a, 1, A+1) { iterate(b, 1, B+1) { iterate(c, 1, C+1) { double p = dp[i][a][b][c]; double p2 = p; if (a >= 2) { double q = double(a)*(a-1)/(a+b+c)/(a-1+b+c)*p; dp[i+1][a-1][b][c] += q; p2 -= q; } if (b >= 2) { double q = double(b)*(b-1)/(a+b+c)/(a-1+b+c)*p; dp[i+1][a][b-1][c] += q; p2 -= q; } if (c >= 2) { // ab double q = double(c)*(c-1)/(a+b+c)/(a-1+b+c)*p; dp[i+1][a][b][c-1] += q; p2 -= q; } dp[i+1][a][b][c] += p2; } } } } double na = 0, nb = 0, nc = 0; iterate(a, 1, A+1) { iterate(b, 1, B+1) { iterate(c, 1, C+1) { na += dp[N][a][b][c]*(A-a); nb += dp[N][a][b][c]*(B-b); nc += dp[N][a][b][c]*(C-c); } } } printf("%.10f %.10f %.10f\n", na, nb, nc); return 0; }