Submission

PPPPPPPPPP

Score: 100

User: popipo

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-13 02:01:34

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