#include<bits/stdc++.h>
using namespace std;

int INF = 1000000000;

int main() {
    int N,K;
    cin >> N >> K;
    vector<int>dist(N+1,INF);
    vector<vector<pair<int,int>>>road(N+1);
    for(int i = 1; i <= N; i++) {
        if(i*2 <= N) {
            road[i].push_back({i*2,1});
        }
        if(i+3 <= N) {
            road[i].push_back({i+3,1});
        }
    }
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>que;
    que.push({0,1});
    dist[0] = 0;
    while (!que.empty()) {
        pair<int,int> x = que.top();
        que.pop();
        if(dist[x.second] < x.first) {
            continue;
        }
        for(auto i:road[x.second]) {
            if(dist[i.first] > x.first+i.second) {
                dist[i.first] = x.first+i.second;
                que.push({dist[i.first],i.first});
            }
        }
    }
    if(dist[N] <= K) {
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }
}