#include <bits/stdc++.h>
#include <atcoder/dsu>

using namespace std;
using namespace atcoder;

using graph = vector<vector<pair<int, int>>>;

vector<int> a, b;

int cycle(const graph &to, vector<bool> &seen, int v, int e)
{
    seen.at(v) = true;
    for (auto &&[c, e_idx] : to.at(v))
    {
        if (e_idx == e)
        {
            continue;
        }
        if (seen.at(c))
        {
            return e_idx;
        }
        int res = cycle(to, seen, c, e_idx);
        if (res != -1)
        {
            return res;
        }
    }
    return -1;
}

void dfs(const graph &to, vector<int> &ans, vector<bool> &rev, int v)
{
    for (auto &&[c, e_idx] : to.at(v))
    {
        if (ans.at(e_idx) != -1)
        {
            continue;
        }
        if (rev.at(a.at(e_idx)))
        {
            ans.at(e_idx) = b.at(e_idx);
        }
        else
        {
            ans.at(e_idx) = a.at(e_idx);
        }
        rev.at(ans.at(e_idx)) = true;
        dfs(to, ans, rev, c);
    }
}

int main()
{
    int n;
    cin >> n;
    a = vector<int>(n);
    b = vector<int>(n);
    for (int i = 0; i < n; i++)
    {
        cin >> a.at(i) >> b.at(i);
        a.at(i)--;
        b.at(i)--;
    }
    dsu t(n);
    for (int i = 0; i < n; i++)
    {
        t.merge(a.at(i), b.at(i));
    }
    auto gs = t.groups();
    int sz = gs.size();
    vector<int> idx(n), idx_in(n);
    vector<graph> to(sz);
    for (int i = 0; i < sz; i++)
    {
        int sz_in = gs.at(i).size();
        to.at(i) = graph(sz_in);
        for (int j = 0; j < sz_in; j++)
        {
            idx.at(gs.at(i).at(j)) = i;
            idx_in.at(gs.at(i).at(j)) = j;
        }
    }
    for (int i = 0; i < n; i++)
    {
        int k = idx.at(a.at(i)), x = idx_in.at(a.at(i)), y = idx_in.at(b.at(i));
        assert(k == idx.at(b.at(i)));
        to.at(k).at(x).emplace_back(y, i);
        to.at(k).at(y).emplace_back(x, i);
    }
    for (int i = 0; i < sz; i++)
    {
        graph to_in = to.at(i);
        int k = to_in.size(), s = 0;
        for (int j = 0; j < k; j++)
        {
            s += to_in.at(j).size();
        }
        if (s != 2 * k)
        {
            puts("No");
            return 0;
        }
    }
    puts("Yes");
    vector<int> ans(n, -1);
    vector<bool> rev(n);
    for (int i = 0; i < sz; i++)
    {
        auto gs_in = gs.at(i);
        int sz_in = gs_in.size();
        graph to_in = to.at(i);
        vector<bool> seen(sz_in);
        int e_idx = cycle(to_in, seen, 0, -1);
        ans.at(e_idx) = a.at(e_idx);
        rev.at(a.at(e_idx)) = true;
        dfs(to_in, ans, rev, idx_in.at(a.at(e_idx)));
    }
    for (int i = 0; i < n; i++)
    {
        cout << ans.at(i) + 1 << endl;
    }
    return 0;
}