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: Wrong Answer)

/*=============================================================================================================================/*
                                               Bismillahir Rahmanir Rahim

      _     ____  ___  ____   _   _  _         ___  ____   _         _     __  __
     / \   / ___||_ _|| __ ) | | | || |       |_ _|/ ___| | |       / \   |  \/  |
    / _ \  \___ \ | | |  _ \ | | | || |        | | \___ \ | |      / _ \  | |\/| |
   / ___ \  ___) || | | |_) || |_| || |___     | |  ___) || |___  / ___ \ | |  | |
  /_/   \_\|____/|___||____/  \___/ |_____|   |___||____/ |_____|/_/   \_\|_|  |_|

   _   __           __  __  __
  |_) (_  _  o__   /   (_  |_
  |_)o__)(_  || |  \__ __) |__

    ___                    _   _      _                _ _               __   ___                 _         _        _
   / __|_ _ ___ ___ _ _   | | | |_ _ (_)_ _____ _ _ __(_) |_ _  _   ___ / _| | _ ) __ _ _ _  __ _| |__ _ __| |___ __| |_
  | (_ | '_/ -_) -_) ' \  | |_| | ' \| \ V / -_) '_(_-< |  _| || | / _ \  _| | _ \/ _` | ' \/ _` | / _` / _` / -_|_-< ' \
   \___|_| \___\___|_||_|  \___/|_||_|_|\_/\___|_| /__/_|\__|\_, | \___/_|   |___/\__,_|_||_\__, |_\__,_\__,_\___/__/_||_|
                                                            |__/                           |___/


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/*=============================================================================================================================*/

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ll, int> pli;
typedef pair<int, ll> pil;
typedef vector<pii> vii;
typedef vector<pil> vil;
typedef vector<pli> vli;
typedef vector<pll> vll;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define sz size()
#define all(a)  a.begin(), a.end()
#define mem(a, b)     memset(a, b, sizeof(a))
#define f0(i,n) for(ll i=0;i<(n);i++)
#define f1(i,n) for(ll i=1;i<=(n);i++)
#define f2(i,a,n) for(ll i=(a);i<=(n);i++)
#define fr(i,n,a) for(ll i=(n);i>=(a);i--)
#define rep(i,a,b,c) for(ll i=(a);i!=(b);i+=(c))
#define nl "\n"


const int INF = 1e9 + 5;
const int MXN = 2e5 + 5;
const int MOD = 1e9 + 7;


void solve(){
    int n; cin >> n;
    if(n >= 30) cout << "YES" << nl;
    else cout << "No" << nl;
}

int main(){
    ll t;
    //cin >> t;
    t = 1;
    while(t--){
        solve();
    }
    return 0;
 }