text: /****************************************************
  *   Template for coding contests                    *
  *   Author    :    Sanjeev Sharma                   *
  *   Email     :    thedevelopersanjeev@gmail.com    *
  *****************************************************/
  #pragma GCC optimize ("O3")
  #pragma GCC optimize("Ofast")
  #pragma GCC optimize ("unroll-loops")
  #pragma GCC optimize("no-stack-protector,fast-math")
  #pragma GCC target ("sse4")
  #pragma comment(linker, "/stack:200000000")
  
  #include <bits/stdc++.h>
  #include <ext/pb_ds/tree_policy.hpp>
  #include <ext/pb_ds/assoc_container.hpp>
  
  #define deb(x) cout << #x << " is " << x << "\n";
  
  using namespace std;
  using namespace __gnu_pbds;
  
  const double PI = 2 * acos(0.0);
  template <typename T>
  using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
  
  int main(){
      ios_base::sync_with_stdio(false);
      cin.tie(NULL);
      cout.tie(NULL);
      int k, x;
      cin >>k >>x;
      if(500 * k >= x)
          cout <<"Yes";
      else 
          cout <<"No";
      return 0;
  }