#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, s;
  cin >> n >> s;
  int a[n + 1], b[n + 1];
  for (int i = 1; i <= n; i++) cin >> a[i];
  for (int i = 1; i <= n; i++) cin >> b[i];
  if (a[1] == 1) {
    if (a[s] == 1) {
      cout << "YES";
      return 0;
    } else if (b[s] == 0) {
      cout << "NO";
      return 0;
    } else if (b[s] != 0) {
      for (int i = s + 1; i <= n; i++) {
        if (a[i] == 1 && b[i] == 1) {
          cout << "YES";
          return 0;
        }
      }
    }
  }
  cout << "NO";
}
