/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2021.08.07 05:36:45
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;



struct StronglyConnectedComponents {
private:
    vector<vector<int>> g, rg;
    vector<int> order; 
    vector<bool> visited;
    int V;
    void dfs(int v) {
        if (visited[v]) return;
        visited[v] = true;
        for (int u : g[v]) dfs(u);
        order.push_back(v);
    }
    void rdfs(int v, int c) {
        if (comp[v] != -1) return;
        comp[v] = c;
        for (int u : rg[v]) rdfs(u, c);
    }
public:
    vector<vector<int>> Graph; 
    vector<int> comp; 
    StronglyConnectedComponents(int v) : V(v) {
        g.resize(v);
        rg.resize(v);
        visited.resize(v);
        comp.resize(v);
    }
    
    void add_vertex(int n = 1) {
        V += n;
        g.resize(V);
        rg.resize(V);
        visited.resize(V);
        comp.resize(V);
    }
    void add_edge(int from, int to) {
        g[from].push_back(to);
        rg[to].push_back(from);
    }
    void build() {
        Graph = vector<vector<int>>();
        order = vector<int>();
        visited.assign(V, false);
        comp.assign(V, -1);
        for (int i = 0; i < V; i++) dfs(i);
        reverse(order.begin(), order.end());
        int number = 0;
        for (int i = 0; i < V; i++) {
            if (comp[order[i]] == -1) {
                rdfs(order[i], number++);
            }
        }
        Graph.resize(number);
        for (int i = 0; i < V; i++) {
            for (int v : g[i]) {
                if (comp[i] == comp[v]) continue;
                Graph[comp[i]].push_back(comp[v]);
            }
        }
    }
};
struct TwoSAT {
private:
    int _n;
    std::vector<bool> _answer;
    StronglyConnectedComponents scc;
public:
    TwoSAT():_n(0),scc(0){}
    explicit TwoSAT(int n) : _n(n), _answer(n), scc(2*n) {}
    void add_clause(int i, bool f, int j, bool g) {
        assert(0 <= i && i < _n);
        assert(0 <= j && j < _n);
        scc.add_edge(2 * i + (f ? 0 : 1), 2 * j + (g ? 1 : 0));
        scc.add_edge(2 * j + (g ? 0 : 1), 2 * i + (f ? 1 : 0));
    }
    
    void only_one(const vector<int> &x, const vector<bool> &t) {
        assert(x.size() == t.size());
        int _m = x.size();
        if (_m <= 12) {
            for (int i = 0; i < _m-1; i++) {
                for (int j = i+1; j < _m; j++) {
                    add_clause(x[i],!t[i],x[j],!t[j]);
                }
            }
            return;
        }
        int _nn = _n;
        _n += _m*2;
        scc.add_vertex(_m*4);
        _answer.resize(_n);
        for (int i = 0; i < _m; i++) {
            add_clause(_nn+i,false,x[i],!t[i]);
            add_clause(_nn+_m+i,false,x[i],!t[i]);
        }
        for (int i = 1; i < _m; i++) {
            add_clause(_nn+i,false,_nn+i-1,true);
            add_clause(x[i],!t[i],_nn+i-1,true);
            add_clause(_nn+_m+i-1,false,_nn+_m+i,true);
            add_clause(x[i-1],!t[i-1],_nn+_m+i,true);
        }
    }
    bool satisfiable() {
        scc.build();
        auto id = scc.comp;
        for (int i = 0; i < _n; i++) {
            if (id[2 * i] == id[2 * i + 1]) return false;
            _answer[i] = id[2 * i] < id[2 * i + 1];
        }
        return true;
    }
    std::vector<bool> answer() { return _answer; }
};
int main() {
    int n;cin >> n;
    TwoSAT ts(n);
    vector<int> a(n),b(n);
    vector<vector<int>> x(n);
    vector<vector<bool>> t(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
        x[a[i]-1].push_back(i);
        x[b[i]-1].push_back(i);
        t[a[i]-1].push_back(true);
        t[b[i]-1].push_back(false);
    }
    for (int i = 0; i < n; i++) {
        ts.only_one(x[i],t[i]);
    }
    if (!ts.satisfiable()) {
        puts("No");
    }
    else {
        puts("Yes");
        auto ans = ts.answer();
        for (int i = 0; i < n; i++) {
            cout << (ans[i]?a[i]:b[i]) << endl;
        }
    }
    return 0;
}