9f60383a2c 2012-06-16        kinaba: #include <iostream>
9f60383a2c 2012-06-16        kinaba: #include <sstream>
9f60383a2c 2012-06-16        kinaba: #include <iomanip>
9f60383a2c 2012-06-16        kinaba: #include <vector>
9f60383a2c 2012-06-16        kinaba: #include <string>
9f60383a2c 2012-06-16        kinaba: #include <map>
9f60383a2c 2012-06-16        kinaba: #include <set>
9f60383a2c 2012-06-16        kinaba: #include <algorithm>
9f60383a2c 2012-06-16        kinaba: #include <numeric>
9f60383a2c 2012-06-16        kinaba: #include <iterator>
9f60383a2c 2012-06-16        kinaba: #include <functional>
9f60383a2c 2012-06-16        kinaba: #include <complex>
9f60383a2c 2012-06-16        kinaba: #include <queue>
9f60383a2c 2012-06-16        kinaba: #include <stack>
9f60383a2c 2012-06-16        kinaba: #include <cmath>
9f60383a2c 2012-06-16        kinaba: #include <cassert>
9f60383a2c 2012-06-16        kinaba: using namespace std;
9f60383a2c 2012-06-16        kinaba: typedef long long LL;
9f60383a2c 2012-06-16        kinaba: typedef long double LD;
9f60383a2c 2012-06-16        kinaba: typedef complex<LD> CMP;
9f60383a2c 2012-06-16        kinaba: 
9f60383a2c 2012-06-16        kinaba: class StrIIRec { public:
9f60383a2c 2012-06-16        kinaba: 	string recovstr(int n, int minInv, string minStr)
9f60383a2c 2012-06-16        kinaba: 	{
9f60383a2c 2012-06-16        kinaba: 		for(int i=0; i<n; ++i)
9f60383a2c 2012-06-16        kinaba: 			if(minStr.find(char('a'+i)) == string::npos)
9f60383a2c 2012-06-16        kinaba: 				minStr += char('a'+i);
9f60383a2c 2012-06-16        kinaba: 
9f60383a2c 2012-06-16        kinaba: 		for(int i=n-1; i>=0; --i) {
9f60383a2c 2012-06-16        kinaba: 			string pre = minStr.substr(0,i);
9f60383a2c 2012-06-16        kinaba: 			string post = minStr.substr(i);
9f60383a2c 2012-06-16        kinaba: 			sort(post.rbegin(), post.rend());
9f60383a2c 2012-06-16        kinaba: 			if( inv(pre+post) >= minInv )
9f60383a2c 2012-06-16        kinaba: 				if(i==n-1) {
9f60383a2c 2012-06-16        kinaba: 					return pre+post;
9f60383a2c 2012-06-16        kinaba: 				} else {
9f60383a2c 2012-06-16        kinaba: 					string mid = "";
9f60383a2c 2012-06-16        kinaba: 					for(int m=i; m<n; ++m)
9f60383a2c 2012-06-16        kinaba: 					{
9f60383a2c 2012-06-16        kinaba: 						for(int k=post.size()-1; k>=0; --k)
9f60383a2c 2012-06-16        kinaba: 							if((m==i && post[k]>minStr[i]) || (m!=i)) {
9f60383a2c 2012-06-16        kinaba: 								string mmid = mid + post[k];
9f60383a2c 2012-06-16        kinaba: 								string ppost = post.substr(0,k) + post.substr(k+1);
9f60383a2c 2012-06-16        kinaba: 								if( inv(pre+mmid+ppost) >= minInv )  {
9f60383a2c 2012-06-16        kinaba: 									mid = mmid;
9f60383a2c 2012-06-16        kinaba: 									post = ppost;
9f60383a2c 2012-06-16        kinaba: 									goto nextM;
9f60383a2c 2012-06-16        kinaba: 								}
9f60383a2c 2012-06-16        kinaba: 							}
9f60383a2c 2012-06-16        kinaba: 					nextM:;
9f60383a2c 2012-06-16        kinaba: 					}
9f60383a2c 2012-06-16        kinaba: 					return pre + mid;
9f60383a2c 2012-06-16        kinaba: 				}
9f60383a2c 2012-06-16        kinaba: 		}
9f60383a2c 2012-06-16        kinaba: 		return "???";
9f60383a2c 2012-06-16        kinaba: 	}
9f60383a2c 2012-06-16        kinaba: 
9f60383a2c 2012-06-16        kinaba: 	int inv(const string& s)
9f60383a2c 2012-06-16        kinaba: 	{
9f60383a2c 2012-06-16        kinaba: 		int cnt = 0;
9f60383a2c 2012-06-16        kinaba: 		for(int i=0; i<s.size(); ++i)
9f60383a2c 2012-06-16        kinaba: 			for(int j=i+1; j<s.size(); ++j)
9f60383a2c 2012-06-16        kinaba: 				if(s[i]>s[j])
9f60383a2c 2012-06-16        kinaba: 					++cnt;
9f60383a2c 2012-06-16        kinaba: 		return cnt;
9f60383a2c 2012-06-16        kinaba: 	}
9f60383a2c 2012-06-16        kinaba: };
9f60383a2c 2012-06-16        kinaba: 
9f60383a2c 2012-06-16        kinaba: // BEGIN CUT HERE
9f60383a2c 2012-06-16        kinaba: #include <ctime>
9f60383a2c 2012-06-16        kinaba: double start_time; string timer()
9f60383a2c 2012-06-16        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
9f60383a2c 2012-06-16        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
9f60383a2c 2012-06-16        kinaba:  { os << "{ ";
9f60383a2c 2012-06-16        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
9f60383a2c 2012-06-16        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
9f60383a2c 2012-06-16        kinaba: void verify_case(const string& Expected, const string& Received) {
9f60383a2c 2012-06-16        kinaba:  bool ok = (Expected == Received);
9f60383a2c 2012-06-16        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
9f60383a2c 2012-06-16        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
9f60383a2c 2012-06-16        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
9f60383a2c 2012-06-16        kinaba: #define END	 verify_case(_, StrIIRec().recovstr(n, minInv, minStr));}
9f60383a2c 2012-06-16        kinaba: int main(){
9f60383a2c 2012-06-16        kinaba: 
9f60383a2c 2012-06-16        kinaba: CASE(0)
9f60383a2c 2012-06-16        kinaba: 	int n = 2;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 1;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "ab";
9f60383a2c 2012-06-16        kinaba: 	string _ = "ba";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: CASE(1)
9f60383a2c 2012-06-16        kinaba: 	int n = 9;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 1;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "efcdgab";
9f60383a2c 2012-06-16        kinaba: 	string _ = "efcdgabhi";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: CASE(2)
9f60383a2c 2012-06-16        kinaba: 	int n = 11;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 55;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "debgikjfc";
9f60383a2c 2012-06-16        kinaba: 	string _ = "kjihgfedcba";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: CASE(3)
9f60383a2c 2012-06-16        kinaba: 	int n = 15;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 0;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "e";
9f60383a2c 2012-06-16        kinaba: 	string _ = "eabcdfghijklmno";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: CASE(4)
9f60383a2c 2012-06-16        kinaba: 	int n = 9;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 20;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "fcdebiha";
9f60383a2c 2012-06-16        kinaba: 	string _ = "fcdehigba";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: CASE(5)
9f60383a2c 2012-06-16        kinaba: 	int n = 20;
9f60383a2c 2012-06-16        kinaba: 	int minInv = 100;
9f60383a2c 2012-06-16        kinaba: 	string minStr = "abcdefghijklmnopqrst";
9f60383a2c 2012-06-16        kinaba: 	string _ = "?";
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: /*
9f60383a2c 2012-06-16        kinaba: CASE(6)
9f60383a2c 2012-06-16        kinaba: 	int n = ;
9f60383a2c 2012-06-16        kinaba: 	int minInv = ;
9f60383a2c 2012-06-16        kinaba: 	string minStr = ;
9f60383a2c 2012-06-16        kinaba: 	string _ = ;
9f60383a2c 2012-06-16        kinaba: END
9f60383a2c 2012-06-16        kinaba: */
9f60383a2c 2012-06-16        kinaba: }
9f60383a2c 2012-06-16        kinaba: // END CUT HERE