Submission

Score: 100

User: chs_14

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-21 13:29:16

#include <bits/stdc++.h>
using namespace std;

void prime(int n, vector<int> &mem) {
    bool is_prime = true;
    
    for (int i = 3; i < n; i+=2)
    {
        for (int &x : mem)
        {
            if (i%x==0) {
                is_prime=false;
                break;
            }
        }
        if (is_prime) {
            mem.push_back(i);
        }
        is_prime=true;
    }
}

int main() {
    cin.tie(0)->sync_with_stdio(0);

    int n;
    cin >> n;
    vector<int> mem(2, 0);
    mem[0] = 2;
    mem[1] = 3;

    if (n<4) {
        for (auto &x : mem)
        {
            if (x<n) {
                cout << x << '\n';
            }
        }
        return 0;        
    }
    
    prime(n, mem);


    for (auto &x : mem)
    {
        cout << x << '\n';
    }
    

    return 0;
}