ohyes

#include <iostream>
using namespace std;

int main (){
    int i, a, cont;
    i = 1;


    while (i <= 100){
        a = 1;
        cont = 0;
        while (a <= i){
            if (i%a == 0){
            cont++;
            }
            a++;
            }
        if (cont== 2){
            cout<<" "<< i <<" "<<endl;
            }

        i++;
    }

}