#include <bits/stdc++.h>
using namespace std;
const double eps = 1e-10;
const double pi = 3.1415926535897932;
const double eln = 2.718281828459045;
vector<int> a[200005];
int p[200005], b[200005], od[200005];
void second(int m, int dah) {
  p[m] = dah;
  b[m] = 1;
  for (int i = 0; i < a[m].size(); ++i) {
    if (!b[a[m][i]]) {
      second(a[m][i], dah + 1);
    }
  }
}
int main() {
  ios::sync_with_stdio(false);
  int n, x, y;
  cin >> n;
  for (int i = 0; i < n - 1; ++i) {
    cin >> x >> y;
    a[x].push_back(y);
    a[y].push_back(x);
  }
  second(1, 1);
  int maxx = 0;
  int first = 0, st, hh;
  for (int i = 0; i < n; ++i) {
    cin >> x;
    if (p[x] > maxx) {
      hh = od[x];
      maxx = p[x];
      st = 1;
      for (int j = 0; j < a[x].size(); ++j) {
        if (!od[a[x][j]]) {
          od[a[x][j]] = st;
        }
      }
    } else if (p[x] == maxx) {
      if (od[x] < hh) {
        cout << "No";
        return 0;
      }
      hh = max(hh, od[x]);
      st++;
      for (int j = 0; j < a[x].size(); ++j) {
        if (!od[a[x][j]]) {
          od[a[x][j]] = st;
        }
      }
    } else if (p[x] < maxx) {
      cout << "No";
      return 0;
    }
  }
  cout << "Yes";
  return 0;
}
