8166493378 2012-05-12        kinaba: #include <iostream>
8166493378 2012-05-12        kinaba: #include <sstream>
8166493378 2012-05-12        kinaba: #include <iomanip>
8166493378 2012-05-12        kinaba: #include <vector>
8166493378 2012-05-12        kinaba: #include <string>
8166493378 2012-05-12        kinaba: #include <map>
8166493378 2012-05-12        kinaba: #include <set>
8166493378 2012-05-12        kinaba: #include <algorithm>
8166493378 2012-05-12        kinaba: #include <numeric>
8166493378 2012-05-12        kinaba: #include <iterator>
8166493378 2012-05-12        kinaba: #include <functional>
8166493378 2012-05-12        kinaba: #include <complex>
8166493378 2012-05-12        kinaba: #include <queue>
8166493378 2012-05-12        kinaba: #include <stack>
8166493378 2012-05-12        kinaba: #include <cmath>
8166493378 2012-05-12        kinaba: #include <cassert>
8166493378 2012-05-12        kinaba: #include <cstring>
8166493378 2012-05-12        kinaba: #ifdef __GNUC__
8166493378 2012-05-12        kinaba: #include <ext/hash_map>
8166493378 2012-05-12        kinaba: #define unordered_map __gnu_cxx::hash_map
8166493378 2012-05-12        kinaba: #else
8166493378 2012-05-12        kinaba: #include <unordered_map>
8166493378 2012-05-12        kinaba: #endif
8166493378 2012-05-12        kinaba: using namespace std;
8166493378 2012-05-12        kinaba: typedef long long LL;
8166493378 2012-05-12        kinaba: typedef complex<double> CMP;
8166493378 2012-05-12        kinaba: 
8166493378 2012-05-12        kinaba: class EllysFractions { public:
8166493378 2012-05-12        kinaba: 	long long getCount(int N)
8166493378 2012-05-12        kinaba: 	{
8166493378 2012-05-12        kinaba: 		LL total = 0;
8166493378 2012-05-12        kinaba: 		for(int k=2; k<=N; ++k)
8166493378 2012-05-12        kinaba: 			total += getExact(k);
8166493378 2012-05-12        kinaba: 		return total;
8166493378 2012-05-12        kinaba: 	}
8166493378 2012-05-12        kinaba: 
8166493378 2012-05-12        kinaba: 	LL getExact(int N)
8166493378 2012-05-12        kinaba: 	{
8166493378 2012-05-12        kinaba: 		int np = 0;
8166493378 2012-05-12        kinaba: 		for(int p=2; p<=N; ++p)
8166493378 2012-05-12        kinaba: 			if(is_prime(p))
8166493378 2012-05-12        kinaba: 				++np;
8166493378 2012-05-12        kinaba: 		LL v = 1;
8166493378 2012-05-12        kinaba: 		for(int i=0; i<np; ++i)
8166493378 2012-05-12        kinaba: 			v *= 2;
8166493378 2012-05-12        kinaba: 		return v/2;
8166493378 2012-05-12        kinaba: 	}
8166493378 2012-05-12        kinaba: 
8166493378 2012-05-12        kinaba: 	bool is_prime(int n)
8166493378 2012-05-12        kinaba: 	{
8166493378 2012-05-12        kinaba: 		for(int k=2; k<n; ++k)
8166493378 2012-05-12        kinaba: 			if(n%k == 0)
8166493378 2012-05-12        kinaba: 				return false;
8166493378 2012-05-12        kinaba: 		return true;
8166493378 2012-05-12        kinaba: 	}
8166493378 2012-05-12        kinaba: };
8166493378 2012-05-12        kinaba: 
8166493378 2012-05-12        kinaba: // BEGIN CUT HERE
8166493378 2012-05-12        kinaba: #include <ctime>
8166493378 2012-05-12        kinaba: double start_time; string timer()
8166493378 2012-05-12        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
8166493378 2012-05-12        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
8166493378 2012-05-12        kinaba:  { os << "{ ";
8166493378 2012-05-12        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
8166493378 2012-05-12        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
8166493378 2012-05-12        kinaba: void verify_case(const long long& Expected, const long long& Received) {
8166493378 2012-05-12        kinaba:  bool ok = (Expected == Received);
8166493378 2012-05-12        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
8166493378 2012-05-12        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
8166493378 2012-05-12        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
8166493378 2012-05-12        kinaba: #define END	 verify_case(_, EllysFractions().getCount(N));}
8166493378 2012-05-12        kinaba: int main(){
8166493378 2012-05-12        kinaba: 
8166493378 2012-05-12        kinaba: CASE(0)
8166493378 2012-05-12        kinaba: 	int N = 1;
8166493378 2012-05-12        kinaba: 	long long _ = 0LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(1)
8166493378 2012-05-12        kinaba: 	int N = 2;
8166493378 2012-05-12        kinaba: 	long long _ = 1LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(2)
8166493378 2012-05-12        kinaba: 	int N = 3;
8166493378 2012-05-12        kinaba: 	long long _ = 3LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(3)
8166493378 2012-05-12        kinaba: 	int N = 5;
8166493378 2012-05-12        kinaba: 	long long _ = 9LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(4)
8166493378 2012-05-12        kinaba: 	int N = 100;
8166493378 2012-05-12        kinaba: 	long long _ = 177431885LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(5)
8166493378 2012-05-12        kinaba: 	int N = 250;
8166493378 2012-05-12        kinaba: 	long long _ = -1LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: CASE(6)
8166493378 2012-05-12        kinaba: 	int N = 4;
8166493378 2012-05-12        kinaba: 	long long _ = 5LL;
8166493378 2012-05-12        kinaba: END
8166493378 2012-05-12        kinaba: }
8166493378 2012-05-12        kinaba: // END CUT HERE