import sys,collections as cl,bisect as bs
sys.setrecursionlimit(100000)
input = sys.stdin.readline
mod = 10**9+7
Max = sys.maxsize
def l(): #intのlist
    return tuple(map(int,input().split()))

def onem(): #Nとかの取得
    return int(input())


import fractions
from functools import reduce
def gcd(*numbers):
    return reduce(fractions.gcd, numbers)

def gcd_list(numbers):
    return reduce(fractions.gcd, numbers)
def lcm_base(x, y):
    return (x * y) // fractions.gcd(x, y)

def lcm(*numbers):
    return reduce(lcm_base, numbers, 1)

def lcm_list(numbers):
    return reduce(lcm_base, numbers, 1)

def main():
    n = onem()
    a = l()

    k = lcm_list(a[:n//2])
    kk = lcm_list(a[n//2:])
    k = lcm(k,kk)
    su = 0

    for i in range(n):
        su += k//a[i]
        
        su %= mod

    print(su)

if __name__ == "__main__":
    
    main()

import collections
import itertools
import operator


class UnionFind:
    def __init__(self, x):
        class KeyDict(dict):
            def __missing__(self, key):
                self[key] = key
                return key

        self.parent = KeyDict()
        self.rank = collections.defaultdict(int)
        self.size = collections.defaultdict(lambda: 1)
        if x is not None:
            for elem in range(x+1):
                _, _, _ = self.parent[elem], self.rank[elem],self.size[elem]

    def find(self, x):
        if self.parent[x] == x:
            return x
        else:
            self.parent[x] = self.find(self.parent[x])
            return self.parent[x]

    def unite(self, x, y):
        x = self.find(x)
        y = self.find(y)
        if not self.are_same(x,y):
            xx = self.size[x]
            yy = self.size[y]
            if self.rank[x] < self.rank[y]:
                self.parent[x] = y
                self.size[y] += xx
            else:
                self.parent[y] = x
                self.size[x] += yy
        if self.rank[x] == self.rank[y]:
            self.rank[x] += 1

    def Size(self,x):
        return self.size[self.find(x)]

    def are_same(self, x, y):
        '''print(x,y,self.find(x),self.find(y),self.find(x) == self.find(y))'''
        return self.find(x) == self.find(y)

    def grouper(self):
        roots = [(x, self.find(x_par)) for x, x_par in self.parent.items()]
        root = operator.itemgetter(1)
        for _, group in itertools.groupby(sorted(roots, key=root), root):
            yield [x for x, _ in group]

n,m = m()

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






### FIXED CODE ###

import sys,collections as cl,bisect as bs
sys.setrecursionlimit(100000)
input = sys.stdin.readline
mod = 10**9+7
Max = sys.maxsize
def l(): #intのlist
    return list(map(int,input().split()))
def m(): #複数文字
    return map(int,input().split())
def onem(): #Nとかの取得
    return int(input())
def s(x): #圧縮
    a = []
    aa = x[0]
    su = 1
    for i in range(len(x)-1):
        if aa != x[i+1]:
            a.append([aa,su])
            aa = x[i+1]
            su = 1
        else:
            su += 1
    a.append([aa,su])
    return a
def jo(x): #listをスペースごとに分ける
    return " ".join(map(str,x))
def max2(x): #他のときもどうように作成可能
    return max(map(max,x))
def In(x,a): #aがリスト(sorted)
    k = bs.bisect_left(a,x)
    if k != len(a) and a[k] ==  x:
        return True
    else:
        return False
"""
def nibu(x,n,r):
    ll = 0
    rr = r
    while True:
        mid = (ll+rr)//2

    if rr == mid:
        return ll
    if (ここに評価入れる):
        rr = mid
    else:
        ll = mid+1
"""



n,m = m()

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