Submission

Score: 80

User: kenmuay

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-12 18:31:22

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

bool check[110];

void prime(int x){
    for(int i=2; i<=sqrt(x); i++){
        if(!check[i]) continue; 
        for(int j=i*i; j<=x; j+=i){ 
            check[j] = false;
        }
    }
}

int main(){
    int n;
    cin >> n;
    fill(check, check+110, true);
    check[0] = false;
    check[1] = false;
    prime(n);
    for(int i=2; i<=n && i<101; i++){
        if(check[i]) cout << i << endl;
    }
    return 0;
}