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#include <iostream>
#include <fstream>
#define INFILE "src/ciur.in"
#define OUTFILE "src/ciur.out"
std::ifstream infile(INFILE);
std::ofstream outfile(OUTFILE);
bool prim(int n)
{
int d = 2;
while (d * d <= n)
{
if (n % d == 0)
return false;
}
return true;
}
int main()
{
int n;
infile >> n;
outfile << prim(n);
}