#include <cstdio>
#include <vector>
using std::vector;
int a[500005], b[500005];
struct Edge {
	int u, v;
	int id;
};
vector<Edge> g[500005];
int color[500005];
int cnt[500005];
int vis[500005];
Edge c[500005];
int stack[500005]; int top = 0;
int set[500005];

void dfs(int u){
	stack[++top] = u;
	vis[u] = 1;
	for(Edge e: g[u]){
		int v = e.v;
		if(!vis[v]){
			//color[id] = v;
			dfs(v);
		}
	}
}

void dfs1(int u){
	//printf("u = %d\n",u);
	vis[u] = 1;
	set[u] = 1;
	for(Edge e: g[u]){
		int v = e.v, id = e.id;
		//printf("v = %d\n",v);
		if(!color[id] && !vis[v]){
			color[id] = v;
			dfs1(v);
		}
	}
}

int main(){
	//printf("haha\n");
	int n;
	scanf("%d",&n);
	for(int i = 1; i <= n; i++){
		scanf("%d%d",&a[i],&b[i]);
		cnt[a[i]]++;
		cnt[b[i]]++;
	} 
	for(int i = 1; i <= n; i++){
		if(cnt[a[i]]==1){
			color[i] = a[i];
			vis[a[i]] = 1;
			//dfs1(a[i]);
		}
		else if(cnt[b[i]]==1){
			color[i] = b[i];
			vis[b[i]] = 1;
			//dfs1(a[i]);
		}
		else if(a[i]==b[i]){
			color[i] = b[i];
			vis[b[i]] = 1;
			//dfs1(a[i]);
		}
		else{
			g[a[i]].push_back(Edge{a[i], b[i],i});
			g[b[i]].push_back(Edge{b[i], a[i],i});
		}
	}
	//printf("ok\n");
	//for(int i = 1; i <= n; i++) if(vis[i] && !set[i]) dfs1(i);
	//printf("break\n");
	for(int i = 1; i <= n; i++){
		if(!vis[i]){
			//printf("i = %d\n",i);
			int find = -1;
			int u = i;
			for(Edge e: g[u]){
				if(!color[e.id]){
					find = e.id;
					break;
				}
			}
			if(find==-1){
				break;
			}
			else{
				top = 0;
				//printf("find = %d: %d %d\n",find,a[find],b[find]);
				color[find] = a[find];
				dfs(a[find]);
				int bad = !vis[b[find]];
				for(int j = 1; j <= top; j++) vis[stack[j]] = 0;
				if(bad){
					top = 0;
					//printf("haha\n");
					color[find] = b[find];
					dfs(b[find]);
					int bb = !vis[a[find]];
					for(int j = 1; j <= top; j++) vis[stack[j]] = 0;
					if(bb) break;
					else{ 
						dfs1(b[find]);
					}
				}
				else dfs1(a[find]);
			}
		}
	}
	int find = 0;
	for(int i = 1; i <= n; i++){ 
		if(!vis[i]) find = 1;
	}
	if(find) printf("No\n");
	else{
		printf("Yes\n");
		for(int i = 1; i <= n; i++) printf("%d\n",color[i]);
	}
	return 0;
}