#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <limits.h>
#include <map>
#include <queue>
#include <stack>
#include <string.h>
#include <vector>

using namespace std;
typedef long long ll;

const int MAX_N = 200000;
vector<int> parent;
vector<int> _rank;
vector<int> _size;

class UnionFind {
public:
  UnionFind(int n) {
    for (int i = 0; i < n; ++i) {
      parent.push_back(i);
      _rank.push_back(0);
      _size.push_back(1);
    }
  }

  int find(int x) {
    if (parent[x] == x) {
      return x;
    } else {
      return parent[x] = find(parent[x]);
    }
  }

  void unite(int x, int y) {
    x = find(x);
    y = find(y);
    if (x == y) return;

    if (_rank[x] < _rank[y]) {
      parent[x] = y;
      _size[y] += _size[x];
    } else {
      parent[y] = x;
      _size[x] += _size[y];
      if (_rank[x] == _rank[y]) ++_rank[x];
    }
  }

  bool same(int x, int y) {
    return find(x) == find(y);
  }

  int size(int x) {
    return _size[find(x)];
  }
};

struct Edge {
  int id;
  int from;
  int to;

  Edge(int id = -1, int from = -1, int to = -1) {
    this->id = id;
    this->from = from;
    this->to = to;
  }
};

int main() {
  int N;

  cin >> N;
  UnionFind uf(MAX_N);

  vector<Edge> E[N + 1];
  vector<Edge> edges;
  int a, b;
  for (int i = 0; i < N; ++i) {
    cin >> a >> b;
    uf.unite(a, b);

    E[a].push_back(Edge(i, a, b));
    E[b].push_back(Edge(i, b, a));
    edges.push_back(Edge(i, a, b));
  }

  int counter[N + 1];
  memset(counter, 0, sizeof(counter));

  for (Edge &e : edges) {
    int x = uf.find(e.from);

    counter[x]++;
  }

  int ans[N];
  memset(ans, -1, sizeof(ans));
  bool checked[N + 1];
  memset(checked, false, sizeof(checked));
  for (int v = 1; v <= N; ++v) {
    if (checked[v]) continue;

    int e_cnt = counter[uf.find(v)];
    if (e_cnt < uf.size(v)) {
      cout << "No" << endl;
      return 0;
    }

    bool visited[N + 1];
    memset(visited, false, sizeof(visited));
    stack<int> stk;
    stk.push(v);
    int root = -1;
    int last_eid = -1;

    while (not stk.empty() && root == -1) {
      int u = stk.top();
      stk.pop();

      visited[u] = true;

      for (Edge &e : E[u]) {
        if (visited[e.to]) {
          last_eid = e.id;
          root = e.to;
          break;
        }

        stk.push(e.to);
      }
    }

    assert(last_eid != -1);
    stack<int> new_stk;
    memset(visited, false, sizeof(visited));
    stk = new_stk;
    stk.push(root);
    while (not stk.empty()) {
      int u = stk.top();
      stk.pop();

      if (visited[u]) continue;
      visited[u] = true;
      checked[u] = true;

      for (Edge &e : E[u]) {
        if (e.id == last_eid) continue;
        if (visited[e.to]) continue;

        ans[e.id] = e.to;
        stk.push(e.to);
      }
    }

    Edge &le = edges[last_eid];
    ans[last_eid] = root;
  }

  cout << "Yes" << endl;
  for (int i = 0; i < N; ++i) {
    cout << ans[i] << endl;
  }

  return 0;
}