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)

//is there any case of -1 or any special corner cases ?
#include<bits/stdc++.h>
using namespace std;
#define int long long int 
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define all(v) v.begin(),v.end()
#define zeros(arr) memset(arr,0,sizeof(arr));
#define precise(num)  cout<<fixed; cout << std::setprecision(num)
#define nl cout<<"\n";
#define test int t;cin>>t;while(t--) 
const int maxx  = 3*1e5 , limit = 9*1e18 , MOD=1e9+7;
#define boost  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl '\n';

int32_t main(){
    boost;
    
    int t;cin>>t;
    if(t>=30){
        cout<<"Yes\n";
    }else{
        cout<<"No\n";
    }
}