#include <bits/stdc++.h> using namespace std; using ch = char; using ll = long long; using ld = long double; using db = double; using st = string; using vdb = vector<db>; using vvdb = vector<vdb>; using vl = vector<ll>; using vvl = vector<vl>; using vvvl = vector<vvl>; using vd = vector<ld>; using vvd = vector<vd>; using vs = vector<st>; using vvs = vector<vs>; using vc = vector<ch>; using vvc = vector<vc>; using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>; const ll mod = 998244353; const ll MOD = 1000000007; using vp = vector<pair<ll,ll>>; #define fi first #define se second int main(){ ll N,X,M; cin>>N>>X>>M; vl A(N); for(auto &a:A) cin>>a; ll ans=0; ll b=0; for(int i=N-1; i>-1; i--){ ll a=0; for(int j=0; j<b; j++){ A[i]/=2; } while(X<=A[i]){ A[i]/=2; a++; } a*=(i+1); ans=max(ans,a+b); } if(ans>M) cout<<"No"<<endl; else cout<<"Yes"<<endl; }