Artifact cbbb9cbac02277e48a3bd3b510b658a534e9f7ff
#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <algorithm>
#include <numeric>
#include <iterator>
#include <functional>
#include <complex>
#include <queue>
#include <stack>
#include <cmath>
#include <cassert>
using namespace std;
typedef long long LL;
typedef long double LD;
typedef complex<LD> CMP;
class HolyNumbers { public:
vector<LL> erat(int N)
{
vector<LL> ps;
vector<bool> is_prime(N+1, true);
for(int p=2; p<=N; ++p)
if(is_prime[p]) {
ps.push_back(p);
for(int q=p+p; q<=N; q+=p)
is_prime[q] = false;
}
return ps;
}
long long count(long long upTo, int maximalPrime)
{
vector<LL> ps = erat(maximalPrime);
return naive(ps, 0, upTo);
}
LL naive(const vector<LL>& ps, int i, LL upto)
{
if( i==ps.size() || upto<ps[i] )
return 1;
if( upto < ps[i]*ps[i] )
{
int k = upper_bound(ps.begin()+i, ps.end(), upto) - ps.begin();
return (k-i)+1;
}
LL sum = naive(ps, i+1, upto);
for(LL p=ps[i], pk=p; pk<=upto; pk*=p*p)
sum += naive(ps, i+1, upto/pk);
return sum;
}
};
// BEGIN CUT HERE
#include <ctime>
double start_time; string timer()
{ ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
{ os << "{ ";
for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
void verify_case(const long long& Expected, const long long& Received) {
bool ok = (Expected == Received);
if(ok) cerr << "PASSED" << timer() << endl; else { cerr << "FAILED" << timer() << endl;
cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
#define END verify_case(_, HolyNumbers().count(upTo, maximalPrime));}
int main(){
CASE(0)
long long upTo = 10LL;
int maximalPrime = 100;
long long _ = 8LL;
END
CASE(1)
long long upTo = 10LL;
int maximalPrime = 3;
long long _ = 5LL;
END
CASE(2)
long long upTo = 123LL;
int maximalPrime = 12;
long long _ = 32LL;
END
CASE(3)
long long upTo = 123LL;
int maximalPrime = 456;
long long _ = 88LL;
END
CASE(4)
long long upTo = 123456789LL;
int maximalPrime = 12345;
long long _ = 25994500LL;
END
CASE(5)
long long upTo = 10000000000LL;
int maximalPrime = 1000000;
long long _ = -1LL;
END
CASE(6)
long long upTo = 10000000000LL;
int maximalPrime = 100;
long long _ = -1LL;
END
}
// END CUT HERE