fd58d23e5f 2012-12-12        kinaba: #include <iostream>
fd58d23e5f 2012-12-12        kinaba: #include <sstream>
fd58d23e5f 2012-12-12        kinaba: #include <iomanip>
fd58d23e5f 2012-12-12        kinaba: #include <vector>
fd58d23e5f 2012-12-12        kinaba: #include <string>
fd58d23e5f 2012-12-12        kinaba: #include <map>
fd58d23e5f 2012-12-12        kinaba: #include <set>
fd58d23e5f 2012-12-12        kinaba: #include <algorithm>
fd58d23e5f 2012-12-12        kinaba: #include <numeric>
fd58d23e5f 2012-12-12        kinaba: #include <iterator>
fd58d23e5f 2012-12-12        kinaba: #include <functional>
fd58d23e5f 2012-12-12        kinaba: #include <complex>
fd58d23e5f 2012-12-12        kinaba: #include <queue>
fd58d23e5f 2012-12-12        kinaba: #include <stack>
fd58d23e5f 2012-12-12        kinaba: #include <cmath>
fd58d23e5f 2012-12-12        kinaba: #include <cassert>
fd58d23e5f 2012-12-12        kinaba: using namespace std;
fd58d23e5f 2012-12-12        kinaba: typedef long long LL;
fd58d23e5f 2012-12-12        kinaba: typedef long double LD;
fd58d23e5f 2012-12-12        kinaba: typedef complex<LD> CMP;
fd58d23e5f 2012-12-12        kinaba: 
fd58d23e5f 2012-12-12        kinaba: class FoxAndHandle { public:
fd58d23e5f 2012-12-12        kinaba: 	string lexSmallestName(string S)
fd58d23e5f 2012-12-12        kinaba: 	{
fd58d23e5f 2012-12-12        kinaba: 		string cur = "";
fd58d23e5f 2012-12-12        kinaba: 		int p = 0;
fd58d23e5f 2012-12-12        kinaba: 		while(cur.size()*2<S.size()) {
fd58d23e5f 2012-12-12        kinaba: 			string next_best;
fd58d23e5f 2012-12-12        kinaba: 			int next_p = -1;
fd58d23e5f 2012-12-12        kinaba: 			for(int x=p; x<S.size(); ++x)
fd58d23e5f 2012-12-12        kinaba: 				if(possible(cur+S[x], x+1, S)) {
fd58d23e5f 2012-12-12        kinaba: 					if(next_p==-1 || next_best>cur+S[x])
fd58d23e5f 2012-12-12        kinaba: 						next_best=cur+S[x], next_p=x+1;
fd58d23e5f 2012-12-12        kinaba: 				}
fd58d23e5f 2012-12-12        kinaba: 			cur = next_best;
fd58d23e5f 2012-12-12        kinaba: 			p = next_p;
fd58d23e5f 2012-12-12        kinaba: 		}
fd58d23e5f 2012-12-12        kinaba: 		return cur;
fd58d23e5f 2012-12-12        kinaba: 	}
fd58d23e5f 2012-12-12        kinaba: 
fd58d23e5f 2012-12-12        kinaba: 	bool possible(const string& used, int x, const string& S)
fd58d23e5f 2012-12-12        kinaba: 	{
fd58d23e5f 2012-12-12        kinaba: 		int freq[26] = {0};
fd58d23e5f 2012-12-12        kinaba: 		int pos[26] = {0};
fd58d23e5f 2012-12-12        kinaba: 		int tot[26] = {0};
fd58d23e5f 2012-12-12        kinaba: 		for(int i=0; i<used.size(); ++i)
fd58d23e5f 2012-12-12        kinaba: 			freq[used[i]-'a']++;
fd58d23e5f 2012-12-12        kinaba: 		for(int i=0; i<S.size(); ++i) {
fd58d23e5f 2012-12-12        kinaba: 			if(x<=i)
fd58d23e5f 2012-12-12        kinaba: 				pos[S[i]-'a']++;
fd58d23e5f 2012-12-12        kinaba: 			tot[S[i]-'a']++;
fd58d23e5f 2012-12-12        kinaba: 		}
fd58d23e5f 2012-12-12        kinaba: 		for(int c=0; c<26; ++c)
fd58d23e5f 2012-12-12        kinaba: 			if((freq[c]+pos[c])*2<tot[c] || freq[c]*2>tot[c])
fd58d23e5f 2012-12-12        kinaba: 				return false;
fd58d23e5f 2012-12-12        kinaba: 		return true;
fd58d23e5f 2012-12-12        kinaba: 	}
fd58d23e5f 2012-12-12        kinaba: };
fd58d23e5f 2012-12-12        kinaba: 
fd58d23e5f 2012-12-12        kinaba: // BEGIN CUT HERE
fd58d23e5f 2012-12-12        kinaba: #include <ctime>
fd58d23e5f 2012-12-12        kinaba: double start_time; string timer()
fd58d23e5f 2012-12-12        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
fd58d23e5f 2012-12-12        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
fd58d23e5f 2012-12-12        kinaba:  { os << "{ ";
fd58d23e5f 2012-12-12        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
fd58d23e5f 2012-12-12        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
fd58d23e5f 2012-12-12        kinaba: void verify_case(const string& Expected, const string& Received) {
fd58d23e5f 2012-12-12        kinaba:  bool ok = (Expected == Received);
fd58d23e5f 2012-12-12        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
fd58d23e5f 2012-12-12        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
fd58d23e5f 2012-12-12        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
fd58d23e5f 2012-12-12        kinaba: #define END	 verify_case(_, FoxAndHandle().lexSmallestName(S));}
fd58d23e5f 2012-12-12        kinaba: int main(){
fd58d23e5f 2012-12-12        kinaba: 
fd58d23e5f 2012-12-12        kinaba: CASE(0)
fd58d23e5f 2012-12-12        kinaba: 	string S = "foxfox";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "fox";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(1)
fd58d23e5f 2012-12-12        kinaba: 	string S = "ccieliel";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "ceil";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(2)
fd58d23e5f 2012-12-12        kinaba: 	string S = "abaabbab";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "aabb";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(3)
fd58d23e5f 2012-12-12        kinaba: 	string S = "bbbbaaaa";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "bbaa";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(4)
fd58d23e5f 2012-12-12        kinaba: 	string S = "fedcbafedcba";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "afedcb";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(5)
fd58d23e5f 2012-12-12        kinaba: 	string S = "nodevillivedon";
fd58d23e5f 2012-12-12        kinaba: 	string _ = "deilvon";
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: /*
fd58d23e5f 2012-12-12        kinaba: CASE(6)
fd58d23e5f 2012-12-12        kinaba: 	string S = ;
fd58d23e5f 2012-12-12        kinaba: 	string _ = ;
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: CASE(7)
fd58d23e5f 2012-12-12        kinaba: 	string S = ;
fd58d23e5f 2012-12-12        kinaba: 	string _ = ;
fd58d23e5f 2012-12-12        kinaba: END
fd58d23e5f 2012-12-12        kinaba: */
fd58d23e5f 2012-12-12        kinaba: }
fd58d23e5f 2012-12-12        kinaba: // END CUT HERE