Submission

Score: 0

User: maldupay

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-10 21:35:53

#include<bits/stdc++.h>
using namespace std;
bool isPrime(int n){
    if(n<2){return false;}
    for(int i=2; i<=sqrt(n); i+=2){
        if(n%i==0){return false;}
    }
    return true;
}
int main(){
    int n;
    cin>>n;

    set<int> prime;
    if(n<=2){cout<<"No prime lesser than "<<n;}
    else{
        for(int i=2; i<n; i++){
            if(isPrime(i)){cout<<i<<" ";}
        }
    }
}