BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String[] s = br.readLine().split(" ");
int n = Integer.parseInt(s[0]);
int m = Integer.parseInt(s[1]);
int x = Integer.parseInt(s[2]);
String[] s1 = br.readLine().split(" ");
Set<Integer> set = new HashSet<>();
for (int i = 0; i < n; i++){
set.add(x - Integer.parseInt(s1[i]));
}
String[] s2 = br.readLine().split(" ");
for (int i = 0; i < m; i++){
if (set.contains(Integer.parseInt(s2[i]))){
System.out.println("YES");
return;
}
}
System.out.println("NO");
