G0006|A30802.|题解

进来看

#include<bits/stdc++.h>
using namespace std;
bool b = 0;
int n;
int main()
{
    cin >> n;
    for(int i = 2;i*i<=n;i++)
    {
        if(n%i==0)
            b=1;
    }
    if(b == 0&&n>1)
        cout << "Yes";
    else
        cout << "No";
    return 0;
}