Panoramix's Prediction Codeforces Beta Round #69 (Div. 2 Only)

#include<bits/stdc++.h>
using namespace std;
bool p(int n)
{
	for(int i=2;i<n;i++)
	{
		if(n%i==0)
		return false;
	}
	return true;
}
int main()
{
	int n,m;
	cin >> n >> m;
	for(int i=n+1; i<=50;i++)
	{
		if(p(i)&&i!=m)
		{
			cout << "NO" << endl;
			return 0;
		}
		else if(p(i)&&i==m)
		{
			cout << "YES" << endl;
			return 0;
		}
		else if(!p(i)&&i==m)
		{
			cout << "NO" << endl;
			return 0;
		}
	}
	
}