Submission

Score: 0

User: lumppengae

Problemset: จำนวนเฉพาะก่อนหน้า

Language: cpp

Time: 0.017 second

Submitted On: 2026-10-06 11:22:19

#include <bits/stdc++.h>
using namespace std;
int main(){
    long long a;
    cin>>a;
    bool b[a];
    
    for(int i=0;i<=a;i++){
        b[i]=true;
    }
    b[0]=false;
    b[1]=false;
    for(int i=2;i<a;i++){
        if(b[i]){
            for(int j=i*i;j<=a;j+=i){
                b[j]=false;
            }
        }
    }
    a-=1;
    int i=5;
    while(i!=0){
        if(b[a]){
            cout<<a<<" ";
            i--;
        }
        a--;
    }
}