#include <stdio.h>

typedef struct List {
	struct List *next;
	int v, id;
} list;

int main()
{
	int i, N, M, u, w, deg[100001] = {};
	list *adj[100001] = {}, e[200001], *p;
	scanf("%d", &N);
	for (i = 0; i < N; i++) {
		scanf("%d %d", &u, &w);
		e[i*2].v = w;
		e[i*2+1].v = u;
		e[i*2].id = i + 1;
		e[i*2+1].id = i + 1;
		e[i*2].next = adj[u];
		e[i*2+1].next = adj[w];
		adj[u] = &(e[i*2]);
		adj[w] = &(e[i*2+1]);
		deg[u]++;
		deg[w]++;
	}
	for (u = 1; u <= N; u++) if (deg[u] == 0) break;
	if (u <= N) {
		printf("No\n");
		fflush(stdout);
		return 0;
	}
	
	int x, flag[100001] = {}, ans[100001] = {}, q[100001], head, tail = 0;
	for (u = 1; u <= N; u++) if (deg[u] == 1) q[tail++] = u;
	for (head = 0; head < tail; head++) {
		u = q[head];
		for (p = adj[u]; p != NULL; p = p->next) {
			w = p->v;
			i = p->id;
			if (ans[i] == 0) {
				ans[i] = u;
				flag[u] = 1;
				deg[w]--;
				if (deg[w] == 1) q[tail++] = w;
			}
		}
	}
	if (tail < N) {
		for (x = 1; x <= N; x++) {
			if (deg[x] <= 1) continue;
			for (p = adj[x]; p != NULL; p = p->next) {
				u = p->v;
				i = p->id;
				if (ans[i] == 0) {
					ans[i] = x;
					flag[x] = 1;
					deg[u]--;
					break;
				}
			}
			for (; u != x; u = w) {
				for (p = adj[u]; p != NULL; p = p->next) {
					w = p->v;
					i = p->id;
					if (ans[i] == 0) {
						ans[i] = u;
						flag[u] = 1;
						deg[w]--;
						break;
					}
				}
				if (p == NULL) break;
			}
		}
	}
	for (u = 1; u <= N; u++) if (flag[u] == 0) break;
	if (u <= N) printf("No\n");
	else {
		printf("Yes\n");
		for (i = 1; i <= N; i++) printf("%d\n", ans[i]);
	}
	fflush(stdout);
	return 0;
}