Submission

Score: 100

User: kavin8888

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-19 19:48:49

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n; cin>>n;
	//sieve
	vector<bool> prime(n+1,true);
	prime[0]=prime[1]=false;
	for(int i=2;i*i<=n;i++)
	{
		if(prime[i])
		{
			for(int j=i*i;j<=n;j+=i)
			{
				prime[j]=false;
			}
		}
	}
	for(int i=2;i<n;i++)
	{
		if(prime[i])
		{
			cout<<i<<'\n';
		}
	}
}