#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using ld = long double;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int N; cin >> N;
    vector<int> A(N), B(N);
    map<pair<int,int>,int> exist;
    rep(i,N) cin >> A[i] >> B[i], A[i]--, B[i]--, exist[{A[i], B[i]}] = exist[{B[i], A[i]}] = 1;

    vector<vector<int>> G(N);
    vector<int> deg(N, 0);
    rep(i,N) {
        G[A[i]].push_back(B[i]);
        G[B[i]].push_back(A[i]);
        deg[A[i]]++, deg[B[i]]++;
    }
    queue<int> q;
    vector<int> used(N, 0);
    rep(i,N) if(deg[i] == 1) {
        q.push(i);
        deg[i] -= 1;
        used[i] = 1;
    }
    map<pair<int,int>,int> ans;
    while(!q.empty()) {
        int v = q.front(); q.pop();
        for(int to : G[v]) {
            if(!used[to]) {
                ans[{v, to}] = ans[{to, v}] = v;
                if(--deg[to] == 1) {
                    q.push(to);
                    used[to] = 1;
                }
            }
        }
    }

    rep(i,N) if(!used[i]) {
        vector<int> vs;
        function<void(int)> dfs = [&](int v) -> void {
            vs.push_back(v);
            used[v] = 1;
            for(int to : G[v]) if(!used[to]) dfs(to);
        }; dfs(i);

        if(vs.size() == 1u) {
            if(exist[{i, i}]) {
                ans[{i, i}] = i;
            } else {
                cout << "No" << endl;
                return 0;
            }
        }
        rep(k,vs.size()) ans[{vs[k], vs[(k + 1) % (int)vs.size()]}] = vs[k];
    }

    cout << "Yes" << endl;
    rep(i,N) {
        cout << ans[{A[i], B[i]}] + 1 << "\n";
        ans[{A[i], B[i]}] ^= (A[i] ^ B[i]);
    }
}