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;
template<typename T, size_t size> ostream& operator<<(ostream &os, const array<T, size> &arr) { os << '{'; string sep; for (const auto &x : arr) os << sep << x, sep = ", "; return os << '}'; }
template<class T> ostream& operator<<(ostream &os, vector<T> V) { os << "[ "; for(auto v : V) os << v << " "; return os << "]"; }
template<class T> ostream& operator<<(ostream &os, set<T> S){ os << "{ "; for(auto s:S) os<<s<<" ";return os<<"}"; }
template<class L, class R> ostream& operator<<(ostream &os, pair<L,R> P) { return os << "(" << P.first << "," << P.second << ")";}
template<class L, class R> ostream& operator<<(ostream &os, map<L,R> M) { os << "{ "; for(auto m:M) os<<"("<<m.first<<":"<<m.second<<") "; return os<<"}"; }
#ifdef LMAO
    #define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
    template <typename Arg1>
    void __f(const char* name, Arg1&& arg1){cerr << name << " : " << arg1 << endl;}
    template <typename Arg1, typename... Args>
    void __f(const char* names, Arg1&& arg1, Args&&... args){ const char* comma = strchr(names + 1, ','); cerr.write(names, comma - names) << " : " << arg1<<" | "; __f(comma+1, args...); }
#else
    #define trace(...) 42
#endif
#define ff first
#define ss second
#define pb push_back
#define eb emplace_back
#define endl "\n"
#define tcase int tt; cin>>tt; while(tt--)
#define tcase2 int tt; cin>>tt; for(int qq=1;qq<=tt;qq++)
#define all(x) x.begin(), x.end()
typedef long long int ll;
typedef  unsigned long long int ull;
typedef long double ld;
const int MAX = 1000010;
const int MOD2 = 998244353;
const int MOD = 1000000007; 
const int INF = 1e8;    
const ll LLINF = 0x3f3f3f3f3f3f3f3f;
const ld EPS = 1e-7;
#define forn(i, n) for(int i = 0; i < (int)n; i++)
#define forne(i, a, b) for(int i = a; i <= b; i++)   
/*****************start************/

int main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);cout<<fixed<<setprecision(25);cerr<<fixed<<setprecision(10);
    int x;
    cin>>x;
    if(x>=30)
    {
        cout<<"Yes"<<endl;
    }
    else
    {
        cout<<"No"<<endl;
    }
    
    return 0;
}