結果
問題 | No.1151 チャレンジゲーム |
ユーザー |
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提出日時 | 2023-02-15 23:46:36 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 897 ms / 2,000 ms |
コード長 | 3,429 bytes |
コンパイル時間 | 1,746 ms |
コンパイル使用メモリ | 180,412 KB |
実行使用メモリ | 16,512 KB |
最終ジャッジ日時 | 2024-07-18 06:08:32 |
合計ジャッジ時間 | 26,509 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 50 |
ソースコード
#pragma GCC optimization ("O3")#include <bits/stdc++.h>using namespace std;using ll = long long;using vec = vector<ll>;using mat = vector<vec>;using pll = pair<ll,ll>;#define INF (1LL<<61)#define MOD 1000000007LL//#define MOD 998244353LL#define EPS (1e-10)#define PR(x) cout << (x) << endl#define PS(x) cout << (x) << " "#define REP(i,m,n) for(ll (i)=(m),(i_len)=(n);(i)<(i_len);++(i))#define FORE(i,v) for(auto (i):v)#define ALL(x) (x).begin(), (x).end()#define SZ(x) ((ll)(x).size())#define REV(x) reverse(ALL((x)))#define ASC(x) sort(ALL((x)))#define DESC(x) {ASC((x)); REV((x));}#define BIT(s,i) (((s)>>(i))&1)#define pb push_back#define fi first#define se secondtemplate<class T> inline int chmin(T& a, T b) {if(a>b) {a=b; return 1;} return 0;}template<class T> inline int chmax(T& a, T b) {if(a<b) {a=b; return 1;} return 0;}class mint {public:ll x;mint(ll x=0) : x((x%MOD+MOD)%MOD) {}mint operator-() const {return mint(-x);}mint& operator+=(const mint& a) {if((x+=a.x)>=MOD) x-=MOD; return *this;}mint& operator-=(const mint& a) {if((x+=MOD-a.x)>=MOD) x-=MOD; return *this;}mint& operator*=(const mint& a) {(x*=a.x)%=MOD; return *this;}mint operator+(const mint& a) const {mint b(*this); return b+=a;}mint operator-(const mint& a) const {mint b(*this); return b-=a;}mint operator*(const mint& a) const {mint b(*this); return b*=a;}mint pow(ll t) const {if(!t) return 1; mint a=pow(t>>1); return (t&1?*this*a:a)*a;}mint inv() const {return pow(MOD-2);}mint& operator/=(const mint& a) {return *this*=a.inv();}mint operator/(const mint& a) const {mint b(*this); return b/=a;}};istream &operator>>(istream& is, mint& a) {ll t; is>>t; a=t; return is;}ostream &operator<<(ostream& os, const mint& a) {return os<<a.x;}using mvec = vector<mint>;using mmat = vector<mvec>;using dvec = vector<double>;using dmat = vector<dvec>;ll N;vec A;map<vec,double> mp;double solve(ll c, ll state, ll win){vec tmp = {c, state, win};if(mp.count(tmp)) return mp[tmp];if(state == 0) {ll s = 0, t = 0;REP(i,0,N) {if(BIT(win,i)) s += A[i];else t += A[i];}if((c == 0 && s > t) || (c == 1 && s <= t)) return mp[tmp] = 1;else return mp[tmp] = 0;}double res = 0;REP(a,0,N) {if(!BIT(state,a)) continue;if(A[a] == 1) {ll nw = win;if(c == 0) nw ^= 1LL<<a;chmax(res, 1-solve(c^1, state^(1LL<<a), nw));continue;}double score = 1;REP(b,0,N) {if(!BIT(state,b)) continue;double coef = (A[a]*A[b])/(double)(A[a]+A[b]-1);double val = 0;if(c == 0) {val += coef*(1-solve(c^1, state^(1LL<<a), win^(1LL<<a)))/A[a];val += coef*solve(c, state^(1LL<<b), win)*(A[a]-1)/A[a]/A[b];}else {val += coef*(1-solve(c^1, state^(1LL<<a), win))/A[a];val += coef*solve(c, state^(1LL<<b), win^(1LL<<b))*(A[a]-1)/A[a]/A[b];}chmin(score, val);}chmax(res, score);}return mp[tmp] = res;}int main(){cin >> N;A = vec(N);REP(i,0,N) cin >> A[i];double ans = solve(0, (1LL<<N)-1, 0);cout << setprecision(12) << ans << endl;return 0;}/**/