#include<bits/stdc++.h> using namespace std; vector<int>a; int main(){ int n; cin>>n; for(int i=1;i<=n;i++){ int b; cin>>b; a.push_back(b); } int x,y; cin>>x>>y; for(int i=0;i<=a.size()-1;i++){ if(a[i]==x&&(a[i+1]==y||a[i-1]==y)){ cout<<"Yes"; return 0; } } cout<<"No"; return 0; }