Problem:
Score : 100 points

Problem Statement

You will turn on the air conditioner if, and only if, the temperature of the room is 30 degrees Celsius or above.

The current temperature of the room is X degrees Celsius. Will you turn on the air conditioner?

Constraints

-40 \leq X \leq 40

X is an integer.

Input

Input is given from Standard Input in the following format:

X

Output

Print Yes if you will turn on the air conditioner; print No otherwise.

Sample Input 1

25

Sample Output 1

No

Sample Input 2

30

Sample Output 2

Yes

Solution in Java (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.io.*;
import java.util.*;
public class Main {        
    public static void main(String args[]) {
        // int t=II();
        // while(--t>=0){
            int x=II();
            if(x>=30)
                System.out.println("Yes");
            else 
                System.out.println("No");

        // }
    }
    
    ////////////////////////////////////
    static scan in=new scan(System.in);
    static int II() {
        return in.nextInt();
    }
    static long IL() {
        return in.nextLong();
    }
    static int[] IIA(int n) {
        int a[]=new int[n];
        for(int i=0;i<n;i++) {
            a[i]=II();
        }
        return a;
    }
    static String IS() {
        return in.next();
    }
    static char IC(){
        return in.next().charAt(0);
    }
    static String[] ISA(int n) {
        String a[]=new String[n];
        for(int i=0;i<n;i++) {
            a[i]=IS();
        }
        return a;
    }
    static char[] ICA(int n) {
        char a[]=new char[n];
        for(int i=0;i<n;i++) {
            a[i]=IC();
        }
        return a;
    }
}
class scan
{
    public static BufferedReader reader;
    public static StringTokenizer token;

    scan(InputStream str)
    {
        reader=new BufferedReader(new InputStreamReader(str));
        token=null;
    }

    static int nextInt()
    {
        while(token==null||!token.hasMoreTokens())
        {
            try { token=new StringTokenizer(reader.readLine());   }
            catch(IOException e){  throw new RuntimeException(e); }
        }
        return Integer.parseInt(token.nextToken());
    }

    static long nextLong()
    {
        while(token==null||!token.hasMoreTokens())
        {
            try { token=new StringTokenizer(reader.readLine());   }
            catch(IOException e){  throw new RuntimeException(e); }
        }
        return Long.parseLong(token.nextToken());
    }

    static String next()
    {
        while(token==null||!token.hasMoreTokens())
        {
            try { token=new StringTokenizer(reader.readLine());   }
            catch(IOException e){  throw new RuntimeException(e); }
        }
        return token.nextToken();
    }

}