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 (Python):




temp = int(input())
if temp >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):



import array
from bisect import *
from collections import *
import fractions
import heapq
from itertools import *
import math
import random
import re
import string
import sys

X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
N= int(input())
if(N>=30):
    print("Yes")
else:
    print("No")

Solution (Python):
t = int(input())

if(t>=30):
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())

if x < 30 :
    print('No')
else:
    print('Yes')

Solution (Python):
n = int(input())
print("Yes" if n >=30 else "No")

Solution (Python):
x = int(input())

if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())
print('Yes' if X >= 30 else 'No')

Solution (Python):
T = int(input())
if T >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):


import sys

def main():
    n = int(input())
    if n >=30:
        print("Yes")
    else:
        print("No")

if __name__ == "__main__":
    main()

Solution (Python):

X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
T = int(input())
if T >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >=30:
  print('Yes')
else:
  print('No')

Solution (Python):
x=int(input())
if x >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input().strip())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
n=int(input())
if n>=30:
  print("Yes")
else:
  print("No")

Solution (Python):
def yana(boo):
  if boo:
    print("Yes")
  else:
    print("No")
yana(int(input())>=30)

Solution (Python):

X = int(input())
if X >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())

if(X >= 30):
    print('Yes')
else:
    print('No')

Solution (Python):
print("Yes" if int(input())>=30 else "No")

Solution (Python):
if int(input()) >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
temp = int(input())

if temp >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):



x = int(input())
if x>=30:
	print("Yes")
else:
	print("No")

Solution (Python):
"""
AtCoder :: Beginner Contest 174 :: Air Conditioner
https://atcoder.jp/contests/abc174/tasks/abc174_a
"""
import sys


def main():
    """Main program."""
    temp = int(sys.stdin.readline())
    if temp >= 30:
        print("Yes")
    else:
        print("No")


if __name__ == '__main__':
    main()

Solution (Python):
import sys
input = sys.stdin.readline

x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())
ans = 'No'
if X >= 30:
    ans = 'Yes'
print(ans)

Solution (Python):
tem = int(input())

print("Yes" if tem > 29 else "No")

Solution (Python):
print('YNeos'[int(input())<30::2])

Solution (Python):
X = int(input())

if 30 <= X:
    print('Yes')
else:
    print('No')

Solution (Python):


X=int(input())
ans="Yes"
if X<30: ans="No"

print(ans)

Solution (Python):
t = int(input())
if t>=30:
  print("Yes")
else:
  print("No")

Solution (Python):

def main():
    t = int(input())
    if ( t >= 30):
        print('Yes')
    else:
        print('No')



main()

Solution (Python):
if int(input())<30:
  print("No")
else:
  print("Yes")

Solution (Python):
a=int(input())
if a >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
print('Yes' if int(input()) >= 30 else 'No')

Solution (Python):

X = int(input())
if X >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input())

if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
print('Yes' if x >= 30 else 'No')

Solution (Python):
import sys
import numpy as np
X = int(input())



if 29 < X:
    print('Yes')
else:
    print('No')

Solution (Python):
x=int(input())
if x>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

ans = 'Yes' if x >= 30 else 'No'

print(ans)

Solution (Python):
x = int(input())

if x >= 30:
  ans = "Yes"
else:
  ans = "No"
print(ans)

Solution (Python):
x =int(input())
print('Yes') if x >= 30 else print('No')

Solution (Python):
x = int(input())
if x>=30:
    print("Yes")
else:
    print("No")

Solution (Python):
a = int(input())
if a>= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
X=int(input())
print("Yes" if X >=30 else "No")

Solution (Python):
X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())
if x>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())
if(x>=30):
	print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input())
if X >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
n = int(input())
if n >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):

import sys


if __name__ == "__main__":
    lines = []
    for line in sys.stdin:
        lines.append(line.rstrip('\r\n'))

    temp = int(lines[0])
    if temp >= 30:
        print("Yes")
    else:
        print("No")

Solution (Python):
X = int(input())
if X >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
x = int(input())
if x>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
'''     ░░█ ▄▀█ █   █▀ █░█ █▀█ █▀▀ █▀▀   █▀█ ▄▀█ █▀▄▀█  
        █▄█ █▀█ █   ▄█ █▀█ █▀▄ ██▄ ██▄   █▀▄ █▀█ █░▀░█     '''







import math;   from collections import *
import sys;    from functools import reduce
import time;   from itertools import groupby



def input()         : return sys.stdin.readline()
def get_ints()      : return map(int, input().strip().split())
def get_list()      : return list(get_ints())
def get_string()    : return list(input().strip().split())
def printxsp(*args) : return print(*args, end="")
def printsp(*args)  : return print(*args, end=" ")


DIRECTIONS = [(+0, +1), (+0, -1), (+1, +0), (+1, -1)] 
NEIGHBOURS = [(-1, -1), (-1, +0), (-1, +1), (+0, -1),\
              (+1, +1), (+1, +0), (+1, -1), (+0, +1)]


CAPS_ALPHABETS = {chr(i+ord('A')) : i for i in range(26)}
SMOL_ALPHABETS = {chr(i+ord('a')) : i for i in range(26)}
INF = float('inf')




x = int(input())
print("Yes" if x >= 30 else "No")

Solution (Python):
X = int(input())
if(X >= 30):
  print('Yes')
else:
  print('No')

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x=int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
if int(input())>=30:
    print("Yes")
else:
    print("No")

Solution (Python):
n=int(input())
print('YNeos'[n<30::2])

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
n = int(input())
if n >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
n = int(input())
if n >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
a=int(input())
ans="Yes"
if a<=29:
  ans="No"
print(ans)

Solution (Python):
x = int(input())
print(['Yes','No'][x < 30])

Solution (Python):
X=int(input())
if X >=30:
    print("Yes")
else:
    print("No")

Solution (Python):
def function(X):
    if X < 30:
        return 'No'
    else:
        return 'Yes'


if __name__ == '__main__':
    X = int(input())
    print(function(X))

Solution (Python):
x = int(input())
if x>=30:
	print('Yes')
else:
	print('No')

Solution (Python):
s = int(input())
if s >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())
if x >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
n = int(input())
if n >= 30:
	print("Yes")
else:
	print("No")

Solution (Python):
x = int(input())

if x >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X=int(input())
if(X>=30):
    print('Yes')
else:
    print('No')

Solution (Python):
X=int(input())
if X>=30:print("Yes")
else:print("No")

Solution (Python):
X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
t=int(input())
if(t >=30):
    print('Yes')
else:
    print('No')

Solution (Python):
n=int(input())
if n>=30:
    print("Yes")
else:
    print("No")

Solution (Python):
n=int(input())
if n>=30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())

if X >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):

"""AtCoder Beginner Contest 174: A - Air Conditioner
https://atcoder.jp/contests/abc174/tasks/abc174_a
"""


def main():
    X = int(input())

    if 30 <= X:
        print('Yes')
    else:
        print('No')


if __name__ == '__main__':
    main()

Solution (Python):
print(["Yes","No"][int(input())<30])

Solution (Python):
x = int(input())
if x>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
def main():
    x=int(input())
    if x>=30:
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':
    main()

Solution (Python):
X=int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
  ans = 'Yes'
else:
  ans = 'No'

print(ans)

Solution (Python):
def main():
    x = int(input())
    if x >= 30:
        ans = 'Yes'
    else:
        ans = 'No'
    print(ans)


if __name__ == "__main__":
    main()

Solution (Python):
X = int(input())

if 30 <= X:
   print('Yes')
else:
   print('No')

Solution (Python):
x=int(input())
if x<30:
    print("No")
else:
    print("Yes")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
def main():
    x = int(input())
    if x >= 30:
        print('Yes')
    else:
        print('No')


if __name__ == '__main__':
    main()

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X=int(input())
print("Yes" if X>=30 else "No")

Solution (Python):
X  = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
a = int(input())
if a >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):

X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X=int(input())
if X>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
def main():
    x = int(input())
    if x >= 30:
        print('Yes')
    else:
        print('No')
if __name__ == '__main__':
    main()

Solution (Python):
t = int(input())
if t < 30:
  print('No')
else:
  print('Yes')

Solution (Python):
x=int(input())
if x>=30:
    print("Yes")
else:
    print("No")

Solution (Python):

	
X = int(input())

if X >= 30:
	print('Yes')
else:
	print('No')

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())

print("Yes") if X >= 30 else print("No")

Solution (Python):
X = int(input())
if X >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
a = int(input())

if a >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
N=int(input())

if N>=30:
    print('Yes')
else:
    print('No')

Solution (Python):


def read_int():
    return int(input().strip())


def read_ints():
    return list(map(int, input().strip().split(' ')))


def solve():
    if read_int() >= 30:
        return 'Yes'
    return 'No'


if __name__ == '__main__':
    print(solve())

Solution (Python):
num = int(input())
if num >= 30: print("Yes")
else: print("No")

Solution (Python):
x=int(input())

print('Yes' if x>=30 else 'No')

Solution (Python):
temp = int(input())
if temp >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
n  = int(input())
if n >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
temp = int(input())
if temp>=30:  print('Yes')
else: print('No')

Solution (Python):
import sys
from os import path

if(path.exists('input.txt')):
    sys.stdin = open("input.txt","r")
    sys.stdout = open("output.txt","w")

n = int(input())
if(n>=30):
    print("Yes")
else:
    print("No")

Solution (Python):
X =int(input())
if X >= 30:
	print("Yes")
else:
	print("No")

Solution (Python):
x = int(input())
if x < 30:
    print("No")
else:
    print("Yes")

Solution (Python):
x = int(input())
ans = 'Yes'
if x < 30: ans ='No'
print(ans)

Solution (Python):
print("Yes" if int(input()) >= 30 else "No")

Solution (Python):
X = int(input())

if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x=int(input())
if x>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = int(input())
if X>=30:
  print("Yes")
else:
  print("No")

Solution (Python):
s = int(input())


if s >= 30:
	print('Yes')
else:
	print('No')

Solution (Python):
x=int(input())
if x>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
n=int(input())
if n>=30:
  print("Yes")
  exit()
print("No")

Solution (Python):
import os
import heapq
import sys,threading
import math
import bisect
import operator
from collections import defaultdict
sys.setrecursionlimit(10**5)
from io import BytesIO, IOBase
def gcd(a,b):
    if b==0:

        return a
    else:
        return gcd(b,a%b)
def power(x, p,m):
    res = 1
    while p:
        if p & 1:
            res = (res * x) % m
        x = (x * x) % m
        p >>= 1
    return res
def inar():
    return [int(k) for k in input().split()]

def lcm(num1,num2):
    return (num1*num2)//gcd(num1,num2)

def main():
    
    t=1
    for _ in range(t):
        n=int(input())
        if n>=30:
            print("Yes")
        else:
            print("No")

BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")

if __name__ == "__main__":
    main()

Solution (Python):
n = int(input())
print("Yes") if n >= 30 else print("No")

Solution (Python):
N = int(input())
if N>=30:
  print("Yes")
else:
  print("No")

Solution (Python):
from math import *
from collections import *
from random import *
from bisect import *
import sys
input=sys.stdin.readline
def lis():
    return list(map(int,input().split()))
def ma():
    return map(int,input().split())
def inp():
    return int(input())
x=inp()
s='No'
if(x>=30):
    s='Yes'
print(s)

Solution (Python):
import math

def resolve():
    X=int(input())
    if(X>=30):
        ans="Yes"
    else:
        ans="No"

    print(ans)
  

resolve()

Solution (Python):
n = int(input())
if n >= 30:
	print("Yes")
else:
	print("No")

Solution (Python):
x = int(input())
if 30<=x:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = input()
X = int(X)
if X >= 30:
    print('Yes')
else :
    print('No')

Solution (Python):
def  AirConditioner():

    num = int(input())
    
    if num >= 30 :
        print('Yes')
        
    else:
        print('No')        
    
if __name__ == '__main__':
    AirConditioner()

Solution (Python):
x=int(input())
if x>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = int(input())

if X >= 30 :
    print("Yes")
else :
    print("No")

Solution (Python):
temp = int(input())
if temp >= 30:
  print('Yes')
else:
  print('No')

Solution (Python):
n=int(input())
if(n>=30):
	print("Yes")
else:
	print("No")

Solution (Python):
x=int(input())
if x >=30:
	print("Yes")
else:
	print("No")

Solution (Python):
x=int(input())
if x>=30:
    print('Yes')
else:    
    print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
"""
    Satwik_Tiwari ;) .
    2ND AUGUST , 2020  - SUNDAY
"""



from __future__ import division, print_function

from fractions import Fraction
import sys
import os
from io import BytesIO, IOBase

from itertools import *
import bisect
from heapq import *
from math import *
from copy import *
from collections import deque
from collections import Counter as counter  
from itertools import combinations as comb 
from itertools import permutations as permutate
from bisect import bisect_left as bl


from bisect import bisect_right as br
from bisect import bisect





BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


def print(*args, **kwargs):
    """Prints the values to a stream, or to sys.stdout by default."""
    sep, file = kwargs.pop("sep", " "), kwargs.pop("file", sys.stdout)
    at_start = True
    for x in args:
        if not at_start:
            file.write(sep)
        file.write(str(x))
        at_start = False
    file.write(kwargs.pop("end", "\n"))
    if kwargs.pop("flush", False):
        file.flush()


if sys.version_info[0] < 3:
    sys.stdin, sys.stdout = FastIO(sys.stdin), FastIO(sys.stdout)
else:
    sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)





from types import GeneratorType
def iterative(f, stack=[]):
  def wrapped_func(*args, **kwargs):
    if stack: return f(*args, **kwargs)
    to = f(*args, **kwargs)
    while True:
      if type(to) is GeneratorType:
        stack.append(to)
        to = next(to)
        continue
      stack.pop()
      if not stack: break
      to = stack[-1].send(to)
    return to
  return wrapped_func





mod = 1000000007
def inp(): return sys.stdin.readline().rstrip("\r\n") 
def out(var): sys.stdout.write(str(var))  
def lis(): return list(map(int, inp().split()))
def stringlis(): return list(map(str, inp().split()))
def sep(): return map(int, inp().split())
def strsep(): return map(str, inp().split())

def zerolist(n): return [0]*n
def nextline(): out("\n")  
def testcase(t):
    for p in range(t):
        solve()
def printlist(a) :
    for p in range(0,len(a)):
        out(str(a[p]) + ' ')
def lcm(a,b): return (a*b)//gcd(a,b)
def power(a,b):
    ans = 1
    while(b>0):
        if(b%2==1):
            ans*=a
        a*=a
        b//=2
    return ans
def ncr(n,r): return factorial(n)//(factorial(r)*factorial(max(n-r,1)))
def isPrime(n) :
    if (n <= 1) : return False
    if (n <= 3) : return True
    if (n % 2 == 0 or n % 3 == 0) : return False
    i = 5
    while(i * i <= n) :
        if (n % i == 0 or n % (i + 2) == 0) :
            return False
        i = i + 6
    return True




def solve():
    n = int(inp())
    if(n>=30):
        print('Yes')
    else:
        print('No')


testcase(1)

Solution (Python):
X = int(input())
if X >= 30 :
    ans = 'Yes'
else:
    ans = 'No'
print(ans)

Solution (Python):
x = int(input())
if x >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):

X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
	print('Yes')
else:
	print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
temp = int(input())

if temp >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
n = int(input())

if n>=30:
    print("Yes")
else: print("No")

Solution (Python):
N = int(input())

if N>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
n=int(input())
if(n>=30):
  print("Yes")
else:
  print("No")

Solution (Python):
import sys
import math
sys.setrecursionlimit(int(1e6))
dprint = print



x = list(map(int, input().split()))[0]
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
x=int(input())

if x < 30:
  print('No')
else:
  print('Yes')

Solution (Python):
x = int(input())
ans = 'No'
if x >= 30:
    ans = 'Yes'
print(ans)

Solution (Python):
x = int(input())

if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X=int(input())
print("Yes" if X>=30 else "No")

Solution (Python):
x=int(input())

print("Yes" if x >= 30 else "No")

Solution (Python):
x = int(input())
if(x>=30):
  print("Yes")
else:
  print("No")

Solution (Python):
print("YNeos"[int(input())<30::2])

Solution (Python):






X= int(input())





if X>=30: print("Yes")
else: print("No")

Solution (Python):
x = int(input())
if x>=30 :
    print("Yes")
else:
    print("No")

Solution (Python):
n = int(input())
if n >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
print("Yes" if int(input()) >= 30 else "No")

Solution (Python):

from collections import defaultdict,deque

ml=lambda:map(int,input().split())
ll=lambda:list(map(int,input().split()))
ii=lambda:int(input())
ip=lambda:list(input())
ips=lambda:input().split()

"""========main code==============="""

t=ii()
if t>=30:
    print("Yes")
else:
    print("No")

Solution (Python):


def main():
    x = int(input())
    if x >= 30:
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':
    main()

Solution (Python):
x = int(input())

if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    X = int(input())
    if X >= 30:
        print("Yes")
    else:
        print("No")


if __name__ == '__main__':
    main()

Solution (Python):
x = int(input())

print('Yes') if x >= 30 else print('No')

Solution (Python):



def main():
    import sys

    input = sys.stdin.readline

    X = int(input())
    if X >= 30:
        print('Yes')
    else:
        print('No')
        

if __name__ == '__main__':
    main()

Solution (Python):
i = int(input())
if i >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
x=int(input())
if x>=30:
  print("Yes")
else:
  print("No")

Solution (Python):
num = int(input())
if num > 29:
  print("Yes")
else:
  print("No")

Solution (Python):
if int(input()) >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
if __name__ == '__main__':
    x = int(input())

    if x >= 30:
        print("Yes")
    else:
        print('No')

Solution (Python):
a = int(input())
if a >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
from sys import stdin
n = int(stdin.readline().rstrip())
if n>=30 :
    print('Yes')
else:
    print('No')

Solution (Python):
x= int(input())
if x >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
x = int(input())

if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())

if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x=int(input())
if x>=30:
	print("Yes")
else:
	print("No")

Solution (Python):
X=int(input())
if X>=30:
    print('Yes')
else:
    print('No')

Solution (Python):
x = int(input())

if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
N = int(input())
if N>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
X=int(input())
if X>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X=int(input())

if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
X = int(input())
if X >= 30:
    print('Yes')
else:
    print('No')

Solution (Python):
print("Yes") if int(input()) >= 30 else print("No")

Solution (Python):

import os
import sys
from io import BytesIO, IOBase




BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")


class union_find:
    def __init__(self, n):
        self.n = n
        self.rank = [0]*n
        self.parent = [int(j) for j in range(n)]
    
    def union(self,i,j):
        i = self.find(i)
        j = self.find(j)
        if self.rank[i] == self.rank[j]:
            self.parent[i] = j
            self.rank[j] += 1

        elif self.rank[i] > self.rank[j]:
            self.parent[j] = i
        else:
            self.parent[i] = j

    def find(self, i):
        temp = i
        if self.parent[temp] != temp:
            self.parent[temp] = self.find(self.parent[temp])
        return self.parent[temp]
from math import log2, ceil
def main():

    
        n = int(input())
        
        if(n>=30):
            print("Yes")
        else:
            print("No")

        
        


        
        



if __name__ == "__main__":
    main()

Solution (Python):
x = int(input())
print('Yes' if x >= 30 else 'No')

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())
if X >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X = int(input())
if X >= 30:
  print("Yes")
else:
  print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
X=int(input())

if X>=30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())

if(x>=30):
    print("Yes")
else:
    print("No")

Solution (Python):




X=int(input())
if X>=30:
  print('Yes')
else:
  print('No')

Solution (Python):
print('Yes') if int(input()) >= 30 else print('No')

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
n=int(input())
if n>=30:
	print("Yes")
else:
	print("No")

Solution (Python):
a=int(input())

if a >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
x = int(input())
if x >= 30:
    print("Yes")
else:
    print("No")

Solution (Python):
print('Yes' if int(input())>=30 else 'No')