2827f87024 2014-01-21        kinaba: #include <iostream>
2827f87024 2014-01-21        kinaba: #include <sstream>
2827f87024 2014-01-21        kinaba: #include <iomanip>
2827f87024 2014-01-21        kinaba: #include <vector>
2827f87024 2014-01-21        kinaba: #include <string>
2827f87024 2014-01-21        kinaba: #include <map>
2827f87024 2014-01-21        kinaba: #include <set>
2827f87024 2014-01-21        kinaba: #include <algorithm>
2827f87024 2014-01-21        kinaba: #include <numeric>
2827f87024 2014-01-21        kinaba: #include <iterator>
2827f87024 2014-01-21        kinaba: #include <functional>
2827f87024 2014-01-21        kinaba: #include <complex>
2827f87024 2014-01-21        kinaba: #include <queue>
2827f87024 2014-01-21        kinaba: #include <stack>
2827f87024 2014-01-21        kinaba: #include <cmath>
2827f87024 2014-01-21        kinaba: #include <cassert>
2827f87024 2014-01-21        kinaba: #include <tuple>
2827f87024 2014-01-21        kinaba: using namespace std;
2827f87024 2014-01-21        kinaba: typedef long long LL;
2827f87024 2014-01-21        kinaba: typedef complex<double> CMP;
2827f87024 2014-01-21        kinaba: 
2827f87024 2014-01-21        kinaba: class PowerOfThree { public:
2827f87024 2014-01-21        kinaba: 	string ableToGet(int x_, int y_)
2827f87024 2014-01-21        kinaba: 	{
2827f87024 2014-01-21        kinaba: 		LL x=x_, y=y_;
2827f87024 2014-01-21        kinaba: 		for(LL tk=1;; tk*=3)
2827f87024 2014-01-21        kinaba: 		{
2827f87024 2014-01-21        kinaba: 			if(x==0 && y==0)
2827f87024 2014-01-21        kinaba: 				break;
2827f87024 2014-01-21        kinaba: 			LL xr = ((x/tk)%3+3)%3;
2827f87024 2014-01-21        kinaba: 			LL yr = ((y/tk)%3+3)%3;
2827f87024 2014-01-21        kinaba: 			if(xr==1 && yr==0) x-=tk;
2827f87024 2014-01-21        kinaba: 			else if(xr==2 && yr==0) x+=tk;
2827f87024 2014-01-21        kinaba: 			else if(xr==0 && yr==1) y-=tk;
2827f87024 2014-01-21        kinaba: 			else if(xr==0 && yr==2) y+=tk;
2827f87024 2014-01-21        kinaba: 			else return "Impossible";
2827f87024 2014-01-21        kinaba: 		}
2827f87024 2014-01-21        kinaba: 		return "Possible";
2827f87024 2014-01-21        kinaba: 	}
2827f87024 2014-01-21        kinaba: };
2827f87024 2014-01-21        kinaba: 
2827f87024 2014-01-21        kinaba: // BEGIN CUT HERE
2827f87024 2014-01-21        kinaba: #include <ctime>
2827f87024 2014-01-21        kinaba: double start_time; string timer()
2827f87024 2014-01-21        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
2827f87024 2014-01-21        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
2827f87024 2014-01-21        kinaba:  { os << "{ ";
2827f87024 2014-01-21        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
2827f87024 2014-01-21        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
2827f87024 2014-01-21        kinaba: void verify_case(const string& Expected, const string& Received) {
2827f87024 2014-01-21        kinaba:  bool ok = (Expected == Received);
2827f87024 2014-01-21        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
2827f87024 2014-01-21        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
2827f87024 2014-01-21        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
2827f87024 2014-01-21        kinaba: #define END	 verify_case(_, PowerOfThree().ableToGet(x, y));}
2827f87024 2014-01-21        kinaba: int main(){
2827f87024 2014-01-21        kinaba: 
2827f87024 2014-01-21        kinaba: CASE(0)
2827f87024 2014-01-21        kinaba: 	int x = 1;
2827f87024 2014-01-21        kinaba: 	int y = 3;
2827f87024 2014-01-21        kinaba: 	string _ = "Possible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(1)
2827f87024 2014-01-21        kinaba: 	int x = 0;
2827f87024 2014-01-21        kinaba: 	int y = 2;
2827f87024 2014-01-21        kinaba: 	string _ = "Possible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(2)
2827f87024 2014-01-21        kinaba: 	int x = 1;
2827f87024 2014-01-21        kinaba: 	int y = 9;
2827f87024 2014-01-21        kinaba: 	string _ = "Impossible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(3)
2827f87024 2014-01-21        kinaba: 	int x = 3;
2827f87024 2014-01-21        kinaba: 	int y = 0;
2827f87024 2014-01-21        kinaba: 	string _ = "Impossible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(4)
2827f87024 2014-01-21        kinaba: 	int x = 1;
2827f87024 2014-01-21        kinaba: 	int y = 1;
2827f87024 2014-01-21        kinaba: 	string _ = "Impossible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(5)
2827f87024 2014-01-21        kinaba: 	int x = -6890;
2827f87024 2014-01-21        kinaba: 	int y = 18252;
2827f87024 2014-01-21        kinaba: 	string _ = "Possible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(6)
2827f87024 2014-01-21        kinaba: 	int x = 1000000000;
2827f87024 2014-01-21        kinaba: 	int y = -1000000000;
2827f87024 2014-01-21        kinaba: 	string _ = "Impossible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(7)
2827f87024 2014-01-21        kinaba: 	int x = 0;
2827f87024 2014-01-21        kinaba: 	int y = 0;
2827f87024 2014-01-21        kinaba: 	string _ = "Possible";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(8)
2827f87024 2014-01-21        kinaba: 	int x = 8;
2827f87024 2014-01-21        kinaba: 	int y = 3;
2827f87024 2014-01-21        kinaba: 	string _ = "P";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: CASE(9)
2827f87024 2014-01-21        kinaba: 	// -3^0 - 3^1 - ... - 3^18 + 3^19
2827f87024 2014-01-21        kinaba: 	// NOTE: 3^19 = 1162261467 > 10^9
2827f87024 2014-01-21        kinaba: 	int x = 581130734;
2827f87024 2014-01-21        kinaba: 	int y = 0;
2827f87024 2014-01-21        kinaba: 	string _ = "P";
2827f87024 2014-01-21        kinaba: END
2827f87024 2014-01-21        kinaba: }
2827f87024 2014-01-21        kinaba: // END CUT HERE