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SEPrime.cpp
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//saru95
#include <fstream>
#include <iostream>
#include <string>
#include <cstring>
#include <complex>
#include <math.h>
#include <utility>
#include <cmath>
#include <set>
#include <vector>
#include <map>
#include <cctype>
#include <queue>
#include <stdio.h>
#include <cstdio>
#include <stack>
#include <algorithm>
#include <list>
#include <ctime>
#include <numeric>
#include <memory.h>
#define all(a) (a).begin(),(a).end()
#define gcd __gcd
#define bitcount __builtin_popcount
using namespace std;
typedef std::vector<int> vi;
typedef std::vector<std::string> vs;
typedef std::pair<int, int> pii;
typedef std::set<int> si;
typedef std::map<std::string, int> msi;
void Sieve(int n){
bool checkArray[n+1] ;
memset(checkArray, true, sizeof(checkArray)) ;
checkArray[0] = false ;
checkArray[1] = false ;
for(int i=2;i<n+1;i++){
for(int j=i+i;j<n+1;j+=i){
checkArray[j] = false ;
}
}
for(int i=0;i<n+1;i++){
if(checkArray[i]!=false)
cout << i << endl;
}
}
int main(int argc, char const *argv[]){
int n ;
cin >> n ;
Sieve(n) ;
return 0 ;
}