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#include <cstdlib>

#include <cmath>

#include <iostream>

#include <vector>

// Function Prototype

bool isPrime(int n);

bool isPrime2(int n);

// Function Body

bool isPrime(int n)

{

if (n <= 1)

{

return false;

}

for (int i = 2; i < n; i++)

{

if (n % i == 0)

{

return false;

}

}

return true;

}

bool isPrime2(int n)

{

if (n <= 1)

{

return false;

}

int limit = std::sqrt(n);

for (int i = 2; i <= limit; i++)

{

if (n % i == 0)

{

return false;

}

}

return true;

}

bool isPrime3(int n)

{

if (n <= 1)

{

return false;

}

static std::vector<int> primes;

int limit = std::sqrt(n);

for (auto it = primes.begin(); it < primes.end(); it++)

{

if (n % *it == 0)

{

return false;

}

}

primes.push_back(n);

return true;

}

int main (int argc, char** argv)

{

for (int i = 0; i < 10000000; i++)

{

if (isPrime3(i))

{

std::cout << i << std::endl;

}

}

return EXIT_SUCCESS;

}