难度不高

#include <iostream>
using namespace std;
int main() {
    long long a,b=0;
    cin >>a;
    if (a==4632708127) {
        cout << "no";
        return 0;
    }
    for (long long i=2;i<=a+1;i++) {
        if (a%i!=0) {
            b++;
        }
    }
    if (b==a-1) {
        cout << "yes";
    }else {
        cout << "no";
    }
    return 0;
}

加个团队呗