H. One Prime – Codeforces Problem Solution in C++

Disclaimer: Make sure you tried enough before checking the solution

Problem: https://codeforces.com/group/MWSDmqGsZm/contest/219432/problem/H

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int num,div,flag=0; // 
	cin>>num; // 3
	div = num/2; // 3 / 2 = 1   
	for(int i =2;i<= div;i++){
		if(num % i == 0){
			cout<<"NO"<<endl;
			flag=1;
			break;
		}
	}
	if(flag == 0){
		cout<<"YES"<<endl;
	}
}

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