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 ff                first
#define ss                second
#define pb                push_back
#define int                long long
#define forn(i, n)        for (int i = 0; i < n; i++)
#define Forn(j, a, b)     for (int j = a; j < b; j++)
#define sp                " "
#define br                "\n"
#define mii               map<int ,int>
#define setbits(x)        _builtin_popcountll(x)
#define zrobits(x)        _builtin_ctzll(x)
#define ps(x,y)           fixed<<setprecision(y)<<x
#define w(x)              int x; cin>>x; while(x--)
#define MAXN              10000000
void c_p_c()
{
#ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("ou.txt", "w", stdout);
#endif
}
//map--------------------------
// auto it=map.begin();
// for(it;it!=map.end();++it)
// {

// }
// int dp[100002][6];
// int fun(int arr[],int i,int k,int z,int n)
// {
//   if(i>=n||k==0||i<0)
//   return 0;
//   if(dp[i][z]!=-1)return dp[i][z];
//   int value=0;
//   if(i<n)
//   value=max(value,arr[i]+fun(arr,i+1,k-1,z,n));
//   if(i>0 and z>0)
//   value=max(value,arr[i]+fun(arr,i-1,k-1,z-1,n));
//   return dp[i][z]=value;
// }


//char num[][10]={"zero","one","two","three","four","five","six","seven","eight","nine"};


void solve()
{
  int x;cin>>x;
  if(x>=30)cout<<"Yes";
  else cout<<"No";
}
int32_t main()
{
  c_p_c();
  solve();
}