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 <iostream>
#include <iomanip>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <vector>
#include <algorithm>
#include <numeric>
#include <random>
#include <bitset>
#include <chrono>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#define pb push_back
#define x  first
#define y  second
#define mp make_pair
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL)
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

#ifndef ONLINE_JUDGE
	// #include "debug.h"
#else
// #define debug(...) 42
#endif

const int mxN=100;
const ld PI=acos(-1);
const int MD=1e9+7;

int main() {
	fast_cin();
	int t=1;
	// cin>>t;
	while(t--)
	{
		int x;
		cin>>x;
		if(x>=30) cout<<"Yes";
		else cout<<"No";
	}
	return 0;	
}