148e3f363b 2011-09-10        kinaba: #include <iostream>
148e3f363b 2011-09-10        kinaba: #include <sstream>
148e3f363b 2011-09-10        kinaba: #include <iomanip>
148e3f363b 2011-09-10        kinaba: #include <vector>
148e3f363b 2011-09-10        kinaba: #include <string>
148e3f363b 2011-09-10        kinaba: #include <map>
148e3f363b 2011-09-10        kinaba: #include <set>
148e3f363b 2011-09-10        kinaba: #include <algorithm>
148e3f363b 2011-09-10        kinaba: #include <numeric>
148e3f363b 2011-09-10        kinaba: #include <iterator>
148e3f363b 2011-09-10        kinaba: #include <functional>
148e3f363b 2011-09-10        kinaba: #include <complex>
148e3f363b 2011-09-10        kinaba: #include <queue>
148e3f363b 2011-09-10        kinaba: #include <stack>
148e3f363b 2011-09-10        kinaba: #include <cmath>
148e3f363b 2011-09-10        kinaba: #include <cassert>
148e3f363b 2011-09-10        kinaba: #include <cstring>
148e3f363b 2011-09-10        kinaba: using namespace std;
148e3f363b 2011-09-10        kinaba: typedef long long LL;
148e3f363b 2011-09-10        kinaba: typedef complex<double> CMP;
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: class NetworkXMessageRecovery { public:
148e3f363b 2011-09-10        kinaba: 	string recover(vector <string> messages)
148e3f363b 2011-09-10        kinaba: 	{
148e3f363b 2011-09-10        kinaba: 		map< char, set<char> > prev;
148e3f363b 2011-09-10        kinaba: 		for(int i=0; i<messages.size(); ++i) {
148e3f363b 2011-09-10        kinaba: 			prev[messages[i][0]];
148e3f363b 2011-09-10        kinaba: 			for(int j=0; j+1<messages[i].size(); ++j)
148e3f363b 2011-09-10        kinaba: 				prev[messages[i][j+1]].insert(messages[i][j]);
148e3f363b 2011-09-10        kinaba: 		}
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: 		string result;
148e3f363b 2011-09-10        kinaba: 		while( !prev.empty() )
148e3f363b 2011-09-10        kinaba: 		{
148e3f363b 2011-09-10        kinaba: 			set<char> cand;
148e3f363b 2011-09-10        kinaba: 			for(map< char,set<char> >::iterator it=prev.begin(); it!=prev.end(); ++it)
148e3f363b 2011-09-10        kinaba: 				if( it->second.empty() )
148e3f363b 2011-09-10        kinaba: 					cand.insert(it->first);
148e3f363b 2011-09-10        kinaba: 			char c = *cand.begin();
148e3f363b 2011-09-10        kinaba: 			result += c;
148e3f363b 2011-09-10        kinaba: 			for(map< char,set<char> >::iterator it=prev.begin(); it!=prev.end(); ++it)
148e3f363b 2011-09-10        kinaba: 				it->second.erase(c);
148e3f363b 2011-09-10        kinaba: 			prev.erase(c);
148e3f363b 2011-09-10        kinaba: 		}
148e3f363b 2011-09-10        kinaba: 		return result;
148e3f363b 2011-09-10        kinaba: 	}
148e3f363b 2011-09-10        kinaba: };
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: // BEGIN CUT HERE
148e3f363b 2011-09-10        kinaba: #include <ctime>
148e3f363b 2011-09-10        kinaba: double start_time; string timer()
148e3f363b 2011-09-10        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
148e3f363b 2011-09-10        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
148e3f363b 2011-09-10        kinaba:  { os << "{ ";
148e3f363b 2011-09-10        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
148e3f363b 2011-09-10        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
148e3f363b 2011-09-10        kinaba: void verify_case(const string& Expected, const string& Received) {
148e3f363b 2011-09-10        kinaba:  bool ok = (Expected == Received);
148e3f363b 2011-09-10        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
148e3f363b 2011-09-10        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
148e3f363b 2011-09-10        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
148e3f363b 2011-09-10        kinaba: #define END	 verify_case(_, NetworkXMessageRecovery().recover(messages));}
148e3f363b 2011-09-10        kinaba: int main(){
148e3f363b 2011-09-10        kinaba: 
148e3f363b 2011-09-10        kinaba: CASE(0)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = {"acd", "bce"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = "abcde";
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(1)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = {"ed", "dc", "cb", "ba"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = "edcba";
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(2)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = {"Fox", "Ciel", "FoxCiel"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = "FoxCiel";
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(3)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = {"a", "A"};
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = "Aa";
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: /*
148e3f363b 2011-09-10        kinaba: CASE(4)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = ;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: CASE(5)
148e3f363b 2011-09-10        kinaba: 	string messages_[] = ;
148e3f363b 2011-09-10        kinaba: 	  vector <string> messages(messages_, messages_+sizeof(messages_)/sizeof(*messages_));
148e3f363b 2011-09-10        kinaba: 	string _ = ;
148e3f363b 2011-09-10        kinaba: END
148e3f363b 2011-09-10        kinaba: */
148e3f363b 2011-09-10        kinaba: }
148e3f363b 2011-09-10        kinaba: // END CUT HERE