Problem:
 Score : 100 points    Problem Statement Takahashi has K  500 -yen coins. (Yen is the currency of Japan.)
If these coins add up to X yen or more, print Yes ; otherwise, print No .      Constraints  1 \leq K \leq 100  1 \leq X \leq 10^5         Input Input is given from Standard Input in the following format:  K  X       Output If the coins add up to X yen or more, print Yes ; otherwise, print No .        Sample Input 1 2 900      Sample Output 1 Yes  Two 500 -yen coins add up to 1000 yen, which is not less than X = 900 yen.       Sample Input 2 1 501      Sample Output 2 No  One 500 -yen coin is worth 500 yen, which is less than X = 501 yen.       Sample Input 3 4 2000      Sample Output 3 Yes  Four 500 -yen coins add up to 2000 yen, which is not less than X = 2000 yen.

Solution (Python):
k, x = map(int, input().split())

if 500 * k >= x:
	print('Yes')
else:
  	print('No')

Solution (Python):
def main():
    K, X = map(int, input().split())
    if 500 * K >= X:
        print("Yes")
    else:
        print("No")


if __name__ == "__main__":
    main()

Solution (Python):
k,x = [int(i) for i in input().split()]

ans=''

if k*500 >= x: ans = 'Yes'
else: ans='No'

print(ans)

Solution (Python):
k,x=map(int, input().split())
print('Yes' if k*500 >= x else 'No')

Solution (Python):
k,x=map(int,input().split())
if(500*k>=x):
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())

if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x = map(int,input().split())
yen = k * 500
if yen < x:
    print('No')
else:
    print('Yes')

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
  print('Yes')
  
else:
  print('No')

Solution (Python):
import math
import re
import copy
import sys

k,x = map(int,input().split())
if 500*k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
a,b=map(int,input().split())
if(500*a>=b):
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int, input().split())
print("Yes" if k*500 >= x else "No")

Solution (Python):
k, x = map(int, input().split())

if k * 500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):

K, X =map(int,input().split())
print("Yes" if K*500>=X else "No")

Solution (Python):
k,x=map(int, input().split())

if 500*k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
if 500 * K >= X:
	print("Yes")
else:
	print("No")

Solution (Python):
import sys
import decimal 

def input():
    return sys.stdin.readline().strip()

def main():
    k, x = map(int, input().split())
    if 500*k >= x:
        print("Yes")
        return
    print("No")

    
    
main()

Solution (Python):
k, x= map(int, input().split())
if 500 * k >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int,input().split())

if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
if 500 * K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int,input().split())
if k *500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())

if X <= 500 * K:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
if 500*k >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
n, x = map(int, input().split())

if n*500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
K, X = map(int, input().split())

print('No' if 500*K < X else 'Yes')

Solution (Python):
K,X=input().split()
K=int(K); X=int(X);
if(K*500>=X):
  print("Yes")
else:
  print("No")

Solution (Python):
a, b = map(int, input().split())
if 500*a >= b:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
if k * 500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
def main():
  num = list(map(int,input().split()))
  if num[0]*500>=num[1]:
    print("Yes")
  else:
    print("No")

main()

Solution (Python):
def func(K, X):
    YEN = 500
    ans = 'Yes' if YEN * K >= X else 'No'
    return ans


if __name__ == "__main__":
    K, X = map(int, input().split())
    print(func(K, X))

Solution (Python):
K,X = map(int, input().split())

SUM = 500*K

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

Solution (Python):

k, x = map(int, input().split())
if 500*k>=x:
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
if 500 * K >= X: print('Yes')
else: print('No')

Solution (Python):
k, x = map(int, input().split())
if k*500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())

if k*500 >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k ,x = map(int, input().split())

if x <= (k*500):
    print('Yes')
else:
    print('No')

Solution (Python):
def main():
    K,X = map(int, input().split())
    if 500*K>=X:
        print("Yes")
    else:
        print("No")

main()

Solution (Python):
K, X = map(int, input().split())

if 500*K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
k,x = map(int,input().split())

if k * 500 >= x :
  print('Yes')
else :
  print('No')

Solution (Python):
k,x = map(int, input().split())

print("Yes" if k*500 >= x else "No")

Solution (Python):
k,x = map(int, input().split())

if k*500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
K, X = map(int, input().split())

if K * 500 >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int, input().split())
print('Yes' if k * 500 >= x else 'No')

Solution (Python):
def resolve():
    k, x = list(map(int, input().split()))

    print('Yes' if k * 500 >= x else 'No')
resolve()

Solution (Python):
import sys
from collections import defaultdict
readline = sys.stdin.buffer.readline



def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


def main():
    k, x = geta(int)

    if k * 500 >= x:
        print('Yes')
    else:
        print("No")


if __name__ == "__main__":
    main()

Solution (Python):
K, X = map(int, input().split())

if 500 * K >= X:
    print("Yes")
else :
    print("No")

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
k , x = map(int,input().split())
if k * 500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
N = list(map(int,input().split(" ")))
 
if N[0]*500 >= N[1]:
  print("Yes")
else:
  print("No")

Solution (Python):
K, X = map(int, input().split())
if 500*K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):

import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


def main():
    K, X = map(int, readline().split())
    if 500 * K >= X:
        print('Yes')
    else:
        print('No')


if __name__ == '__main__':
    main()

Solution (Python):
K, X=map(int,input().split())

if 500*K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())

if 500*k >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:print('Yes')
else:print('No')

Solution (Python):
k,x=map(int,input().split())
if k*500>=x:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
total = k * 500

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

Solution (Python):
K, X = map(int, input().split())

if 500 * K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
def main():
    k, x = map(int, input().split())
    print("Yes" if 500*k >=x else "No")

if __name__ == '__main__':
    main()

Solution (Python):
K, X = map(int,input().split())

s = K * 500

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

Solution (Python):
K, X = map(int, input().split())
print("Yes" if 500*K >= X else "No")

Solution (Python):
k,x = (int(x) for x in input().split())
if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X= map(int, input().split())

if K*500 >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())
a = 500*K

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

Solution (Python):
K, X = map(int, input().split())
print("Yes" if 500 * K >= X else "No")

Solution (Python):
K,X=map(int,input().split())
if K*500>=X:
  print('Yes')
else:
  print('No')

Solution (Python):
K,X = map(int, input().split())

if 500*K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
def resolve():
    k,x=map(int,input().split())
    if k*500 >= x:
        print("Yes")
    else:
        print("No")
resolve()

Solution (Python):
x = input().split()
if int(x[0])*500 >= int(x[1]):
  print('Yes')
else:
  print('No')

Solution (Python):
k,x = map(int,input().split())

if k*500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
n,m=map(int,input().split())
if 500*n >= m:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x= map(int, input().split())
print("Yes" if x<=500*k else "No")

Solution (Python):
x, y = map(int, input().split())
if 500 * x >= y:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
print("Yes" if k*500>=x else "No")

Solution (Python):
k, x = map(int, input().split())
print("Yes" if k*500>=x else "No")

Solution (Python):
k,x=map(int,input().split())

if k*500>=x:
  print('Yes')

else:
  print('No')

Solution (Python):
K,X = map(int,input().split())
print('Yes' if 500*K >= X else 'No')

Solution (Python):
k,x=map(int,input().split())
if x>k*500:
    print('No')
else:
    print('Yes')

Solution (Python):
K,X=map(int,input().split())
print('Yes' if K*500>=X else 'No')

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


def main():
    K, X = map(int, input().split())
    print("Yes") if 500*K >= X else print("No")


if __name__ == '__main__':
    main()

Solution (Python):
k, x = map(int, input().split())

if 500*k >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
K,X = map(int,input().split())
if K * 500 >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X = map(int,input().split())
print('Yes' if 500*K >= X else 'No')

Solution (Python):
K,X = map(int,input().split())

if K*500>=X:
    print('Yes')
else:
    print('No')

Solution (Python):
K, Y = map(int, input().split())

if 500*K >= Y:
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
if K * 500 < X:
    print('No')
else:
    print('Yes')

Solution (Python):
k,x = map(int, raw_input().split(' '))
print 'Yes' if k * 500 >= x else 'No'

Solution (Python):
k,x = map(int,input().split())
if 500 * k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):

k, x = map(int, input().split())
if 500*k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
def main():
    K, X = map(int, input().split())
    ans = "Yes" if 500 * K >= X else "No"
    print(ans)



if __name__ == "__main__":
    main()

Solution (Python):
k, x = map(int, input().split())

if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):

k, x = map(int, input().split())
if 500 * k < x:
    print("No")
else:
    print("Yes")

Solution (Python):
k,x = map(int,input().split())

if k*500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
ni = lambda: int(input())
nm = lambda: map(int, input().split())
nl = lambda: list(map(int, input().split()))

k,x = nm()

if 500*k>=x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
print('Yes') if 500*k >= x else print('No')

Solution (Python):
k, x = map(int, input().split())

if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
if k*500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int,input().split())
if k*500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
k,x=map(int,input().split())
print("Yes" if k*500 >= x else "No")

Solution (Python):
a,b=map(int,input().split())
if 500*a>=b:
  print('Yes')
else:
  print('No')

Solution (Python):
k,x = map(int,input().split())
money = 500 * k
if money >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X=map(int,input().split())
if 500 * K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
il = [int(k) for k in input().split()]
K = il[0]
X = il[1]

if 500 * K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x=map(int,input().split());print('YNeos'[500*k<x::2])

Solution (Python):
k, x = map(int, input().split())
if x <= k*500:
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
print("Yes" if 500 * K >= X else "No")

Solution (Python):
a,b=map(int,input().split())
print('No' if b>a*500 else 'Yes')

Solution (Python):
import sys
def ISI(): return map(int, sys.stdin.readline().rstrip().split())
k, x = ISI()
if 500*k<x:print("No")
else:print("Yes")

Solution (Python):
n, x = map(int, input().split())
if x <= n*500:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())
print('Yes' if 500*K >=X else 'No')

Solution (Python):
K, X = map(int, input().split())

if 500 *K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
print("Yes") if 500 * k >= x else print("No")

Solution (Python):
k, x = map(int, input().split())

if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):

def s0():return input()
def s1():return input().split()
def s2(n):return [input() for x in range(n)]
def s3(n):return [[input().split()] for _ in range(n)]
def n0():return int(input())
def n1():return [int(x) for x in input().split()]
def n2(n):return [int(input()) for _ in range(n)]
def n3(n):return [[int(x) for x in input().split()] for _ in range(n)]
def t3(n):return [tuple(int(x) for x in input().split()) for _ in range(n)]
def p0(b,yes,no): print(yes) if b else print(no)





k,x=n1()

p0(k*500>=x,"Yes","No")

Solution (Python):

def s0():return input()
def s1():return input().split()
def s2(n):return [input() for x in range(n)]
def s3(n):return [[input().split()] for _ in range(n)]
def n0():return int(input())
def n1():return [int(x) for x in input().split()]
def n2(n):return [int(input()) for _ in range(n)]
def n3(n):return [[int(x) for x in input().split()] for _ in range(n)]
def t3(n):return [tuple(int(x) for x in input().split()) for _ in range(n)]






k,x=n1()
print("Yes" if k*500>=x else "No")

Solution (Python):
k, x = map(int,input().split())
print('Yes' if (500 * k) >= x else 'No')

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

ns = lambda: stdin.readline().rstrip()
ni = lambda: int(stdin.readline().rstrip())
nm = lambda: map(int, stdin.readline().split())
nl = lambda: list(map(int, stdin.readline().split()))

K,X=nm()
print('Yes' if X<=500*K else 'No')

Solution (Python):
K,X=map(int,input().split())
print("Yes" if K*500>=X else"No")

Solution (Python):
k,x = map(int,input().split())
m = 500*k
if(m>=x):
    print('Yes')
else:
    print('No')

Solution (Python):
K, X = map(int, input().split())
print("{}".format('Yes' if 500 * K >= X else 'No'))

Solution (Python):
k, x = map(int, input().split())
print("Yes" if 500*k >= x else "No")

Solution (Python):
K, X = map(int, input().split())

if K*500 >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())
if K * 500 >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
    print('Yes')
else:
    print('No')

Solution (Python):
inputs=input().split(" ")
print("Yes" if int(inputs[0])*500>=int(inputs[1]) else "No")

Solution (Python):
k,x=map(int,input().split())
if k*500>=x:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
if k*500>=x:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x=map(int,input().split())
if k*500>=x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
if x <= 500 * k:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x = (int(x) for x in input().split())

if k * 500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
a, b=map(int, input().split())

if b/a<=500:

  print("Yes")

  

else:

  print("No")

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
  print("Yes")
else:
  print("No")

Solution (Python):
k,x = map(int, input().split())
print('No' if k*500<x else 'Yes')

Solution (Python):
import sys
K, X = map(int, sys.stdin.readline().strip().split())

if K * 500 >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
K, X = list(map(int, input().split()))
if 500*K>=X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, n = map(int, input().split())
print("Yes" if 500 * k >= n else "No")

Solution (Python):
k,x=map(int,input().split());print("YNeos"[x>k*500::2])

Solution (Python):
K, X = map(int, input().split())
sum_ = 500 * K
if sum_ >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = list(map(int, input().split()))
if k * 500 >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
import itertools
import math
import fractions
import functools
k, x = map(int, input().split())
if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
print("YNeos"[eval(input().replace(" ", "*500<"))::2])

Solution (Python):

K, X = map(int, input().split())

if K*500>=X:
    print("Yes")
    quit()
    
print("No")

Solution (Python):
K, X = map(int,input().split())
if 500 * K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())

if 500 * k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):

k, x =list(map(int, input().split()))
if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
t = k * 500
if t >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x = map(int,input().split())
if k*500>=x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
print('Yes' if 500 * k >= x else 'No')

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
    print("Yes")
else:
    print("No")

Solution (Python):

K, X = map(int, input().split())


if 500 * K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
k,x=map(int,input().split())
print("Yes"if 500*k>=x else "No")

Solution (Python):
k,x=map(int,input().split())

if 500*k>=x:
	print("Yes")
else:
	print("No")

Solution (Python):
k, x = map(int, input().split())
if 500*k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
A, B = map(int, input().split())
if(500*A >= B):
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
if k * 500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int, input().split())
if k * 500 >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
K, X = map(int, input().split())
print('Yes' if 500*K >= X else 'No')

Solution (Python):
import sys
import math
import bisect


def main():
    k, x = map(int, input().split())
    if k * 500 >= x:
        print('Yes')
    else:
        print('No')

if __name__ == "__main__":
    main()

Solution (Python):
a, b = list(map(int, input().split()))
if a * 500 >= b:
    print("Yes")
else:
    print("No")

Solution (Python):

k,x = map(int,input().split())

if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
from sys import stdin, setrecursionlimit


def main():
    input = stdin.buffer.readline
    k, x = map(int, input().split())
    print('Yes') if 500 * k >= x else print('No')


if __name__ == "__main__":
    setrecursionlimit(10000)
    main()

Solution (Python):
K, X = map(int, input().split(' '))

if K * 500 >= X:
    print('Yes')
else:
    print('No')

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

    K, X = map(int, input().split())
    if 500*K >= X:
        print('Yes')
    else:
        print('No')


if __name__ == "__main__":
    main()

Solution (Python):
k, x = map(int, input().split())
print('Yes' if k*500 >= x else 'No')

Solution (Python):
K, X = map(int, input().split())
print('Yes' if 500*K >= X else 'No')

Solution (Python):
K, X = map(int, input().split())
print('Yes' if K*500 >= X else 'No')

Solution (Python):
A, B = map(int, input().split())
if 500 * A >= B:
  print('Yes')
else:
  print('No')

Solution (Python):
K, X = map(int, input().split())

if 500 * K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
K,X=list(map(int,input().split()))
if 500*K>=X:
    print('Yes')
else:
    print('No')

Solution (Python):
K,X=map(int,input().split())
if X<=K*500:
  print("Yes")
else:
  print("No")

Solution (Python):
K,X = map(int, input().split())




print("Yes" if K * 500 >= X else "No")

Solution (Python):

 
k,x = map(int, input().split())
if k*500 < x :
	print("No")
else:
	print("Yes")

Solution (Python):
K,X = map(int,input().split())
if 500*K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())

if 500 * k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x = (int(i) for i in input().split())

print("Yes" if k*500>=x else "No" )

Solution (Python):
k, x = map(int, input().split())

if k*500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
K, X = map(int, input().split())
print("Yes") if 500*K >= X else print("No")

Solution (Python):
k, x = list(map(int, input().split()))

if 500*k >= x:
    print('Yes')
else:
    print('No')

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

K, X = map(int, input().split())
print('Yes' if X <= 500 * K else 'No')

Solution (Python):
import fileinput

k, x = map(int, input().split())

if 500 * k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
a = input().split()

k = int(a[0])
x = int(a[1])

if(500*k >= x):
  print("Yes")
else:
  print("No")

Solution (Python):
def ABC_150_A():
    K,X = map(int, input().split())
    if 500*K>=X:
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':

    ABC_150_A()

Solution (Python):
n1, n2 = [int(i) for i in input().split()]
if n1 * 500 >= n2:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())
print("Yes" if K*500>=X else "No")

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):

"""
Created on Sat May  9 13:38:00 2020

@author: shinba
"""

k,x = map(int,input().split())

if 500*k >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
n, m = map(int, input().split())
if 500*n >= m:
  print("Yes")
else:
  print("No")

Solution (Python):
k, x = map(int, input().split())

if x <= 500*k:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = list(map(int, input().split()))
if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x = map(int,input().split())
if ((k * 500 ) >= x):
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = input().split()
K = int(k)
X = int(x)
result = 500 * K

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

Solution (Python):
K,X = map(int, input().split())
K = 500 * K

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

Solution (Python):
K,X = map(int, input().split())
print('Yes') if 500*K >= X else print('No')

Solution (Python):
k,x=map(int,input().split())

if 500*k>=x:
  print('Yes')
else:
  print('No')

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
K, W = map(int, input().split())

if K*500 >= W:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
print('Yes' if x <= 500 * k else 'No')

Solution (Python):
K, X = map(int,input().split())

if 500 * K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int, input().split())
if k * 500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())

if 500 * K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
if __name__ == "__main__":
    k, x = map(int, input().split())
    if k * 500 >= x:
        print("Yes")
    else:
        print("No")

Solution (Python):
a,b=map(int,input().split())
if b<=a*500:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x=map(int,input().split())

if 500*k>=x:
    print('Yes')
    
else:
    print('No')

Solution (Python):
a = input().split()
if int(a[0])*500 < int(a[1]):
  print("No")
else:
  print("Yes")

Solution (Python):
K, X = map(int, input().split())
if 500*K >= X:
  print("Yes")
else:
  print("No")

Solution (Python):
K,X=map(int,input().split())
if 500*K>=X:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x=map(int,input().split())
print('Yes' if k*500>=x else 'No')

Solution (Python):
K,X = map(int,input().split())

S = 500*K
if S >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
print('Yes' if 500*k>=x else'No')

Solution (Python):
k,x=map(int,input().split())
if 500*k>=x:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X = map(int,input().split())

if 500 * K >= X :
    print('Yes')
else :
    print('No')

Solution (Python):
a , b = list(map(int,input().strip().split()))
print('No' if ((a*500) < b) else 'Yes')

Solution (Python):
a , b = list(map(int,input().strip().split()))
print('No' if ((a*500) < b) else 'Yes')

Solution (Python):
a , b = list(map(int,input().strip().split()))
print('No' if ((a*500) < b) else 'Yes')

Solution (Python):
n, x = map(int, input().split())
if n*500 >= x:
  print("Yes")
else:
  print("No")

Solution (Python):
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop
from itertools import permutations, accumulate
from math import sqrt, ceil, floor, factorial
from bisect import bisect_left, bisect_right
from copy import deepcopy
from operator import itemgetter
from fractions import gcd
import sys
def I(): return int(input())  
def Is(): return map(int, input().split())  
def LI(): return list(map(int, input().split()))  
def TI(): return tuple(map(int, input().split()))  
def IR(n): return [I() for _ in range(n)]
def LIR(n): return [LI() for _ in range(n)]
def TIR(n): return [TI() for _ in range(n)]
def S(): return input()
def Ss(): return input().split()  
def LS(): return list(input())  
def SR(n): return [S() for _ in range(n)]
def SsR(n): return [Ss() for _ in range(n)]
def LSR(n): return [LS() for _ in range(n)]
sys.setrecursionlimit(1000000)
MOD = 1000000007
INF = float('inf')

k, x = Is()
if k*500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = list(map(int,input().split()))
if 500 * K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
if k * 500 >= x:
    print('Yes')
else:
    print('No')

Solution (Python):


K, X = map(int, input().split())
print('Yes' if X <= 500 * K else 'No')

Solution (Python):
K,X=map(int,input().split())
if K*500>=X:
  print("Yes")
else:
  print("No")

Solution (Python):
def is_much_money(num_of_coin, yen):
  if num_of_coin * 500 >= yen:
    return "Yes"
  else:
    return "No"
 
if __name__ == "__main__":
    num_of_coin, yen = input().split()
    judgement = is_much_money(int(num_of_coin), int(yen))
    print(judgement)

Solution (Python):
K, X = map(int,input().split())
if 500 * K >= X:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int,input().split())	
if k*500 >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
print("Yes" if 500*k>=x else "No" )

Solution (Python):
K, X = map(int, input().split())
print("Yes") if X <= K * 500 else print("No")

Solution (Python):
K, X = map(int, input().split())

print("Yes" if 500*K >= X else "No")

Solution (Python):
K, X = map(int, input().split())
if K * 500 >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X=map(int,input().split())

print("Yes" if K*500>=X else "No")

Solution (Python):
K, X = map(int, input().split())
print('Yes' if 500*K >= X else 'No')

Solution (Python):
k, x = map(int, input().split())

print(["No", "Yes"][k * 500 >= x])

Solution (Python):
k,x=map(int,input().split())
print("Yes" if 500*k>=x else "No")

Solution (Python):
a,b = input().split()
if int(a) * 500 >= int(b):
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
print('Yes' if 500 * k >= x else 'No')

Solution (Python):
x,k =map(int,(input().split()))


if 500*x>=k:
    print("Yes")
else:
    print("No")

Solution (Python):
k,x = map(int,input().split())
if k * 500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = [int(_) for _ in input().split()]
if 500 * K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
K,X=input().split()
k=int(K)
x=int(X)
if 500*k>=x:
  print('Yes')
else:
  print('No')

Solution (Python):
k, x = map(int,input().split())
if k*500>=x:
  print("Yes")
else:
  print("No")

Solution (Python):
k,x=map(int,input().split())
print('Yes' if 500*k>=x else 'No')

Solution (Python):
k,x = map(int, input().split())
if 500*k >=x:print("Yes")
else: print("No")

Solution (Python):
k,x = map(int,input().split())


if(k * 500 >= x):
    print('Yes')
else:
    print('No')

Solution (Python):
k, x = map(int, input().split())
if x <= 500*k:
    print("Yes")
else:
    print("No")

Solution (Python):
k, x = map(int, input().split())
if 500 * k >= x:
  print('Yes')
else:
  print('No')

Solution (Python):
K, X = map(int, input().split())

if 500 * K >= X:
    print("Yes")
else:
    print("No")

Solution (Python):
K,X = map(int,input().split())
if 500*K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
print("Yes" if 500*k>=x else "No")

Solution (Python):
K,X = map(int,input().split())

if K*500>=X:
    print('Yes')
else:
    print('No')

Solution (Python):
k,x=map(int,input().split())
print('Yes' if 500*k>=x else 'No')

Solution (Python):
k, x = map(int, input().split())
print('Yes' if 500 * k >= x else 'No')

Solution (Python):
k,x =map(int,input().split())
if k*500 >= x:
    print("Yes")
else:
    print("No")

Solution (Python):

def main():
    K,X = map(int, input().split())
    if K*500 >=X:
        print("Yes")
    else:
        print("No")


if __name__ == '__main__':
    main()

Solution (Python):
K,X=map(int,input().split())
if X<=K*500:
    print("Yes")
else:
    print("No")

Solution (Python):
K, X = map(int, input().split())
if 500*K >= X:
    print('Yes')
else:
    print('No')

Solution (Python):
def solve():
    K, X = map(int, input().split())
    return "Yes" if K*500 >= X else "No"

print(solve())