4fd800b3a8 2011-02-23        kinaba: #include <iostream>
4fd800b3a8 2011-02-23        kinaba: #include <sstream>
4fd800b3a8 2011-02-23        kinaba: #include <iomanip>
4fd800b3a8 2011-02-23        kinaba: #include <vector>
4fd800b3a8 2011-02-23        kinaba: #include <string>
4fd800b3a8 2011-02-23        kinaba: #include <map>
4fd800b3a8 2011-02-23        kinaba: #include <set>
4fd800b3a8 2011-02-23        kinaba: #include <algorithm>
4fd800b3a8 2011-02-23        kinaba: #include <numeric>
4fd800b3a8 2011-02-23        kinaba: #include <iterator>
4fd800b3a8 2011-02-23        kinaba: #include <complex>
4fd800b3a8 2011-02-23        kinaba: #include <queue>
4fd800b3a8 2011-02-23        kinaba: #include <stack>
4fd800b3a8 2011-02-23        kinaba: #include <cmath>
4fd800b3a8 2011-02-23        kinaba: #include <cassert>
4fd800b3a8 2011-02-23        kinaba: using namespace std;
4fd800b3a8 2011-02-23        kinaba: typedef long long LL;
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: class Multifactorial
4fd800b3a8 2011-02-23        kinaba: {
4fd800b3a8 2011-02-23        kinaba: public:
4fd800b3a8 2011-02-23        kinaba: 	string calcMultiFact(int n, int k)
4fd800b3a8 2011-02-23        kinaba: 	{
4fd800b3a8 2011-02-23        kinaba: 		LL ans = 1;
4fd800b3a8 2011-02-23        kinaba: 		for(LL v=n; v>0; v-=k)
4fd800b3a8 2011-02-23        kinaba: 		{
4fd800b3a8 2011-02-23        kinaba: 			if( ans*v<ans || ans*v/v!=ans || ans*v>1000000000000000000LL )
4fd800b3a8 2011-02-23        kinaba: 				return "overflow";
4fd800b3a8 2011-02-23        kinaba: 			ans *= v;
4fd800b3a8 2011-02-23        kinaba: 		}
4fd800b3a8 2011-02-23        kinaba: 		stringstream sout;
4fd800b3a8 2011-02-23        kinaba: 		sout << ans;
4fd800b3a8 2011-02-23        kinaba: 		return sout.str();
4fd800b3a8 2011-02-23        kinaba: 	}
4fd800b3a8 2011-02-23        kinaba: };
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: // BEGIN CUT HERE
4fd800b3a8 2011-02-23        kinaba: #include <ctime>
4fd800b3a8 2011-02-23        kinaba: double start_time;string timer() { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: template <typename T> string print_array(const vector<T> &V) { ostringstream os; os << "{ "; for (typename vector<T>::const_iterator iter = V.begin(); iter != V.end(); ++iter) os << '\"' << *iter << "\","; os << " }"; return os.str(); }
4fd800b3a8 2011-02-23        kinaba: int verify_case(const string &Expected, const string &Received) { if (Expected == Received) cerr << "PASSED" << timer() << endl; else { cerr << "FAILED" << timer() << endl; cerr << "\tExpected: \"" << Expected << '\"' << endl; cerr << "\tReceived: \"" << Received << '\"' << endl; } return 0;}
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: template<int N> struct Case_ { Case_(){start_time=clock();} };
4fd800b3a8 2011-02-23        kinaba: char Test_(...);
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<0>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 14;
4fd800b3a8 2011-02-23        kinaba: 	int k = 3;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "12320";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<1>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 5;
4fd800b3a8 2011-02-23        kinaba: 	int k = 4;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "5";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<2>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 1000;
4fd800b3a8 2011-02-23        kinaba: 	int k = 2;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "overflow";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<3>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 2000000000;
4fd800b3a8 2011-02-23        kinaba: 	int k = 1900000000;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "200000000000000000";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<4>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 1000;
4fd800b3a8 2011-02-23        kinaba: 	int k = 256;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "84232704000";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: int Test_(Case_<5>) {
4fd800b3a8 2011-02-23        kinaba: 	int n = 2000000000;
4fd800b3a8 2011-02-23        kinaba: 	int k = 1;
4fd800b3a8 2011-02-23        kinaba: 	string RetVal = "overflow";
4fd800b3a8 2011-02-23        kinaba: 	return verify_case(RetVal, Multifactorial().calcMultiFact(n, k)); }
4fd800b3a8 2011-02-23        kinaba: 
4fd800b3a8 2011-02-23        kinaba: template<int N> void Run_() { cerr << "Test Case #" << N << "..." << flush; Test_(Case_<N>()); Run_<sizeof(Test_(Case_<N+1>()))==1 ? -1 : N+1>(); }
4fd800b3a8 2011-02-23        kinaba: template<>      void Run_<-1>() {}
4fd800b3a8 2011-02-23        kinaba: int main() { Run_<0>(); }
4fd800b3a8 2011-02-23        kinaba: // END CUT HERE
4fd800b3a8 2011-02-23        kinaba: