339e20815a 2014-10-24        kinaba: #include <iostream>
339e20815a 2014-10-24        kinaba: #include <sstream>
339e20815a 2014-10-24        kinaba: #include <iomanip>
339e20815a 2014-10-24        kinaba: #include <vector>
339e20815a 2014-10-24        kinaba: #include <string>
339e20815a 2014-10-24        kinaba: #include <map>
339e20815a 2014-10-24        kinaba: #include <set>
339e20815a 2014-10-24        kinaba: #include <algorithm>
339e20815a 2014-10-24        kinaba: #include <numeric>
339e20815a 2014-10-24        kinaba: #include <iterator>
339e20815a 2014-10-24        kinaba: #include <functional>
339e20815a 2014-10-24        kinaba: #include <complex>
339e20815a 2014-10-24        kinaba: #include <queue>
339e20815a 2014-10-24        kinaba: #include <stack>
339e20815a 2014-10-24        kinaba: #include <cmath>
339e20815a 2014-10-24        kinaba: #include <cassert>
339e20815a 2014-10-24        kinaba: #include <tuple>
339e20815a 2014-10-24        kinaba: using namespace std;
339e20815a 2014-10-24        kinaba: typedef long long LL;
339e20815a 2014-10-24        kinaba: typedef complex<double> CMP;
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: class GreaterGame { public:
339e20815a 2014-10-24        kinaba: 	double calc(vector <int> hand, vector <int> sothe)
339e20815a 2014-10-24        kinaba: 	{
339e20815a 2014-10-24        kinaba: 		const int N = hand.size();
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: 		set<int> me, you, rest;
339e20815a 2014-10-24        kinaba: 		for(int c=1; c<=2*N; ++c) rest.insert(c);
339e20815a 2014-10-24        kinaba: 		for(int c: hand) me.insert(c), rest.erase(c);
339e20815a 2014-10-24        kinaba: 		for(int c: sothe) you.insert(c), rest.erase(c);
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: 		double ans = 0.0;
339e20815a 2014-10-24        kinaba: 		while(!you.empty() && *you.rbegin()>0)
339e20815a 2014-10-24        kinaba: 		{
339e20815a 2014-10-24        kinaba: 			int y = *you.rbegin(); you.erase(y);
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: 			auto it = me.rbegin();
339e20815a 2014-10-24        kinaba: 			if(*it > y) {
339e20815a 2014-10-24        kinaba: 				while(*it>y) {
339e20815a 2014-10-24        kinaba: 					auto kt = it;
339e20815a 2014-10-24        kinaba: 					++kt;
339e20815a 2014-10-24        kinaba: 					if(kt==me.rend() || *kt<y)
339e20815a 2014-10-24        kinaba: 						break;
339e20815a 2014-10-24        kinaba: 					it = kt;
339e20815a 2014-10-24        kinaba: 				}
339e20815a 2014-10-24        kinaba: 				me.erase(*it);
339e20815a 2014-10-24        kinaba: 				++ans;
339e20815a 2014-10-24        kinaba: 			} else {
339e20815a 2014-10-24        kinaba: 				me.erase(me.begin());
339e20815a 2014-10-24        kinaba: 			}
339e20815a 2014-10-24        kinaba: 		}
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: 		for(int c: me)
339e20815a 2014-10-24        kinaba: 			ans += count_if(rest.begin(), rest.end(), [&](int y){return y<c;}) / (double)rest.size();
339e20815a 2014-10-24        kinaba: 		return ans;
339e20815a 2014-10-24        kinaba: 	}
339e20815a 2014-10-24        kinaba: };
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: // BEGIN CUT HERE
339e20815a 2014-10-24        kinaba: #include <ctime>
339e20815a 2014-10-24        kinaba: double start_time; string timer()
339e20815a 2014-10-24        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
339e20815a 2014-10-24        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
339e20815a 2014-10-24        kinaba:  { os << "{ ";
339e20815a 2014-10-24        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
339e20815a 2014-10-24        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
339e20815a 2014-10-24        kinaba: void verify_case(const double& Expected, const double& Received) {
339e20815a 2014-10-24        kinaba:  bool ok = (abs(Expected - Received) < 1e-9);
339e20815a 2014-10-24        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
339e20815a 2014-10-24        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
339e20815a 2014-10-24        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
339e20815a 2014-10-24        kinaba: #define END	 verify_case(_, GreaterGame().calc(hand, sothe));}
339e20815a 2014-10-24        kinaba: int main(){
339e20815a 2014-10-24        kinaba: 
339e20815a 2014-10-24        kinaba: CASE(0)
339e20815a 2014-10-24        kinaba: 	int hand_[] = {4,2};
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = {-1,-1};
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = 1.5;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: CASE(1)
339e20815a 2014-10-24        kinaba: 	int hand_[] = {4,2};
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = {1,3};
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = 2.0;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: CASE(2)
339e20815a 2014-10-24        kinaba: 	int hand_[] = {2};
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = {-1};
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = 1.0;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: CASE(3)
339e20815a 2014-10-24        kinaba: 	int hand_[] = {1,3,5,7};
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = {8,-1,4,-1};
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = 2.5;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: CASE(4)
339e20815a 2014-10-24        kinaba: 	int hand_[] = {6,12,17,14,20,8,16,7,2,15};
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = {-1,-1,4,-1,11,3,13,-1,-1,18};
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = 8.0;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: /*
339e20815a 2014-10-24        kinaba: CASE(5)
339e20815a 2014-10-24        kinaba: 	int hand_[] = ;
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = ;
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = ;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: CASE(6)
339e20815a 2014-10-24        kinaba: 	int hand_[] = ;
339e20815a 2014-10-24        kinaba: 	  vector <int> hand(hand_, hand_+sizeof(hand_)/sizeof(*hand_));
339e20815a 2014-10-24        kinaba: 	int sothe_[] = ;
339e20815a 2014-10-24        kinaba: 	  vector <int> sothe(sothe_, sothe_+sizeof(sothe_)/sizeof(*sothe_));
339e20815a 2014-10-24        kinaba: 	double _ = ;
339e20815a 2014-10-24        kinaba: END
339e20815a 2014-10-24        kinaba: */
339e20815a 2014-10-24        kinaba: }
339e20815a 2014-10-24        kinaba: // END CUT HERE