d4ec396a23 2014-04-21        kinaba: #include <iostream>
d4ec396a23 2014-04-21        kinaba: #include <sstream>
d4ec396a23 2014-04-21        kinaba: #include <iomanip>
d4ec396a23 2014-04-21        kinaba: #include <vector>
d4ec396a23 2014-04-21        kinaba: #include <string>
d4ec396a23 2014-04-21        kinaba: #include <map>
d4ec396a23 2014-04-21        kinaba: #include <set>
d4ec396a23 2014-04-21        kinaba: #include <algorithm>
d4ec396a23 2014-04-21        kinaba: #include <numeric>
d4ec396a23 2014-04-21        kinaba: #include <iterator>
d4ec396a23 2014-04-21        kinaba: #include <functional>
d4ec396a23 2014-04-21        kinaba: #include <complex>
d4ec396a23 2014-04-21        kinaba: #include <queue>
d4ec396a23 2014-04-21        kinaba: #include <stack>
d4ec396a23 2014-04-21        kinaba: #include <cmath>
d4ec396a23 2014-04-21        kinaba: #include <cassert>
d4ec396a23 2014-04-21        kinaba: #include <tuple>
d4ec396a23 2014-04-21        kinaba: using namespace std;
d4ec396a23 2014-04-21        kinaba: typedef long long LL;
d4ec396a23 2014-04-21        kinaba: typedef complex<double> CMP;
d4ec396a23 2014-04-21        kinaba: 
d4ec396a23 2014-04-21        kinaba: int bitcnt(int x)
d4ec396a23 2014-04-21        kinaba: {
d4ec396a23 2014-04-21        kinaba: 	int c = 0;
d4ec396a23 2014-04-21        kinaba: 	for(; x; x>>=1)
d4ec396a23 2014-04-21        kinaba: 		c += x&1;
d4ec396a23 2014-04-21        kinaba: 	return c;
d4ec396a23 2014-04-21        kinaba: }
d4ec396a23 2014-04-21        kinaba: 
d4ec396a23 2014-04-21        kinaba: class WolvesAndSheep { public:
d4ec396a23 2014-04-21        kinaba: 	int getmin(vector <string> field)
d4ec396a23 2014-04-21        kinaba: 	{
d4ec396a23 2014-04-21        kinaba: 		int H = field.size();
d4ec396a23 2014-04-21        kinaba: 		int W = field[0].size();
d4ec396a23 2014-04-21        kinaba: 		int best = W*H;
d4ec396a23 2014-04-21        kinaba: 		for(int mask=0; mask<(1<<(W-1)); ++mask)
d4ec396a23 2014-04-21        kinaba: 		{
d4ec396a23 2014-04-21        kinaba: 			vector<vector<pair<int,int>>> sw(H);
d4ec396a23 2014-04-21        kinaba: 			for(int y=0; y<field.size(); ++y)
d4ec396a23 2014-04-21        kinaba: 				for(int s=0,w=0,x=0; x<W; ++x)
d4ec396a23 2014-04-21        kinaba: 				{
d4ec396a23 2014-04-21        kinaba: 					if(field[y][x]=='S') s++;
d4ec396a23 2014-04-21        kinaba: 					if(field[y][x]=='W') w++;
d4ec396a23 2014-04-21        kinaba: 					if(s&&w)
d4ec396a23 2014-04-21        kinaba: 						goto next;
d4ec396a23 2014-04-21        kinaba: 					if((mask & (1<<x)) || x==W-1) {
d4ec396a23 2014-04-21        kinaba: 						sw[y].emplace_back(s,w);
d4ec396a23 2014-04-21        kinaba: 						s=w=0;
d4ec396a23 2014-04-21        kinaba: 					}
d4ec396a23 2014-04-21        kinaba: 				}
d4ec396a23 2014-04-21        kinaba: 			{
d4ec396a23 2014-04-21        kinaba: 				int score = bitcnt(mask);
d4ec396a23 2014-04-21        kinaba: 				int WW = sw[0].size();
d4ec396a23 2014-04-21        kinaba: 				vector<pair<int,int>> cur(WW);
d4ec396a23 2014-04-21        kinaba: 				for(int y=0; y<sw.size(); ++y)
d4ec396a23 2014-04-21        kinaba: 				{
d4ec396a23 2014-04-21        kinaba: 					bool dame = false;
d4ec396a23 2014-04-21        kinaba: 					for(int x=0; x<WW; ++x) {
d4ec396a23 2014-04-21        kinaba: 						cur[x].first += sw[y][x].first;
d4ec396a23 2014-04-21        kinaba: 						cur[x].second += sw[y][x].second;
d4ec396a23 2014-04-21        kinaba: 						if(cur[x].first && cur[x].second)
d4ec396a23 2014-04-21        kinaba: 							dame = true;
d4ec396a23 2014-04-21        kinaba: 					}
d4ec396a23 2014-04-21        kinaba: 					if(dame) {
d4ec396a23 2014-04-21        kinaba: 						score ++;
d4ec396a23 2014-04-21        kinaba: 						cur = sw[y];
d4ec396a23 2014-04-21        kinaba: 					}
d4ec396a23 2014-04-21        kinaba: 				}
d4ec396a23 2014-04-21        kinaba: 
d4ec396a23 2014-04-21        kinaba: 				best = min(best, score);
d4ec396a23 2014-04-21        kinaba: 			}
d4ec396a23 2014-04-21        kinaba: 		next:;
d4ec396a23 2014-04-21        kinaba: 		}
d4ec396a23 2014-04-21        kinaba: 		return best;
d4ec396a23 2014-04-21        kinaba: 	}
d4ec396a23 2014-04-21        kinaba: };
d4ec396a23 2014-04-21        kinaba: 
d4ec396a23 2014-04-21        kinaba: // BEGIN CUT HERE
d4ec396a23 2014-04-21        kinaba: #include <ctime>
d4ec396a23 2014-04-21        kinaba: double start_time; string timer()
d4ec396a23 2014-04-21        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
d4ec396a23 2014-04-21        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
d4ec396a23 2014-04-21        kinaba:  { os << "{ ";
d4ec396a23 2014-04-21        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
d4ec396a23 2014-04-21        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
d4ec396a23 2014-04-21        kinaba: void verify_case(const int& Expected, const int& Received) {
d4ec396a23 2014-04-21        kinaba:  bool ok = (Expected == Received);
d4ec396a23 2014-04-21        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
d4ec396a23 2014-04-21        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
d4ec396a23 2014-04-21        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
d4ec396a23 2014-04-21        kinaba: #define END	 verify_case(_, WolvesAndSheep().getmin(field));}
d4ec396a23 2014-04-21        kinaba: int main(){
d4ec396a23 2014-04-21        kinaba: 
d4ec396a23 2014-04-21        kinaba: CASE(0)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {"W.WSS",
d4ec396a23 2014-04-21        kinaba:  "WW.S.",
d4ec396a23 2014-04-21        kinaba:  ".SSS.",
d4ec396a23 2014-04-21        kinaba:  "SSS.S",
d4ec396a23 2014-04-21        kinaba:  ".SS.S"};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 2;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(1)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {".....",
d4ec396a23 2014-04-21        kinaba:  ".....",
d4ec396a23 2014-04-21        kinaba:  "....."};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 0;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(2)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {".SS",
d4ec396a23 2014-04-21        kinaba:  "...",
d4ec396a23 2014-04-21        kinaba:  "S..",
d4ec396a23 2014-04-21        kinaba:  "W.W"};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 1;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(3)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {"WWWSWWSSWWW",
d4ec396a23 2014-04-21        kinaba:  "WWSWW.SSWWW",
d4ec396a23 2014-04-21        kinaba:  "WS.WSWWWWS."};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 10;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(4)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {".W.S.W.W",
d4ec396a23 2014-04-21        kinaba:  "W.W.S.W.",
d4ec396a23 2014-04-21        kinaba:  ".S.S.W.W",
d4ec396a23 2014-04-21        kinaba:  "S.S.S.W.",
d4ec396a23 2014-04-21        kinaba:  ".S.W.W.S",
d4ec396a23 2014-04-21        kinaba:  "S.S.W.W.",
d4ec396a23 2014-04-21        kinaba:  ".W.W.W.S",
d4ec396a23 2014-04-21        kinaba:  "W.W.S.S."};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 7;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(5)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {"W.SSWWSSSW.SS",
d4ec396a23 2014-04-21        kinaba:  ".SSSSW.SSWWWW",
d4ec396a23 2014-04-21        kinaba:  ".WWWWS.WSSWWS",
d4ec396a23 2014-04-21        kinaba:  "SS.WSS..W.WWS",
d4ec396a23 2014-04-21        kinaba:  "WSSS.SSWS.W.S",
d4ec396a23 2014-04-21        kinaba:  "WSS.WS...WWWS",
d4ec396a23 2014-04-21        kinaba:  "S.WW.S.SWWWSW",
d4ec396a23 2014-04-21        kinaba:  "WSSSS.SSW...S",
d4ec396a23 2014-04-21        kinaba:  "S.WWSW.WWSWSW",
d4ec396a23 2014-04-21        kinaba:  ".WSSS.WWSWWWS",
d4ec396a23 2014-04-21        kinaba:  "..SSSS.WWWSSS",
d4ec396a23 2014-04-21        kinaba:  "SSWSWWS.W.SSW",
d4ec396a23 2014-04-21        kinaba:  "S.WSWS..WSSS.",
d4ec396a23 2014-04-21        kinaba:  "WS....W..WSS."};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 24;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(6)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = {"WW..SS",
d4ec396a23 2014-04-21        kinaba:  "WW..SS",
d4ec396a23 2014-04-21        kinaba:  "......",
d4ec396a23 2014-04-21        kinaba:  "......",
d4ec396a23 2014-04-21        kinaba:  "SS..WW",
d4ec396a23 2014-04-21        kinaba:  "SS..WW"};
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = 2;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: /*
d4ec396a23 2014-04-21        kinaba: CASE(7)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = ;
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = ;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: CASE(8)
d4ec396a23 2014-04-21        kinaba: 	string field_[] = ;
d4ec396a23 2014-04-21        kinaba: 	  vector <string> field(field_, field_+sizeof(field_)/sizeof(*field_));
d4ec396a23 2014-04-21        kinaba: 	int _ = ;
d4ec396a23 2014-04-21        kinaba: END
d4ec396a23 2014-04-21        kinaba: */
d4ec396a23 2014-04-21        kinaba: }
d4ec396a23 2014-04-21        kinaba: // END CUT HERE