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 C++ (GCC 9.2.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
#define pi 3.14159265359
#define int long long
#define pii pair<int,int>
const int mod=1e9+7;

int dx[]={-1,0,1,0};
int dy[]={0,-1,0,1};


int32_t  main()
{ 
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
 
  #ifndef ONLINE_JUDGE
  freopen("input.txt","rt",stdin);
  freopen("output.txt","wt",stdout);
  #endif

  int x;
  cin>>x;
  if(x>=30)cout<<"Yes\n";
  else cout<<"No\n";

}