80A. Panoramix's Prediction - Codeforces Solution C++

➤  Problem Link : 80A. Panoramix's Prediction 

✅ C++ Solution :

 
#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m,i,j;
	int flag=-1;
	cin>>n>>m;
	int arr[m+1];
	memset(arr,0,sizeof(arr));
	for(i=2;i*i<=m;i++)
	{
		if(arr[i]==0)
		{
			for(j=i*i;j<=m;j+=i)
			{
				arr[j]=1;
			}
		}	
	}
	if(arr[m]==0)
		flag=1;
	for(i=n+1;i<m;i++)
	{
		if(arr[i]==0)
			flag=-1;
	}	
	if(flag==-1)
		cout<<"NO";
	else
		cout<<"YES";
		
	
	return 0;
}

 

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About Utkarsh Gupta

I am a Member Technical at D.E. Shaw India Pvt. Ltd. CodingWithArt is a blog where you find tricks and solutions to challenging coding and development problems. I aim to build a universal tech platform for every enthusiast out there.