import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.lang.AssertionError
import java.util.*
import kotlin.math.abs
import kotlin.math.max
import kotlin.math.min

val MOD = 1_000_000_007
data class Edge(val i: Int, val v: Int, val u: Int)
class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  fun solve() {
    val th = Thread(null, Runnable {
      solve2()
    }, "solve", 1 shl 26)
    th.start()
    th.join()
  }

  fun solve2() {
    val N = ni()
    val E = Array(N){Edge(it, ni() - 1, ni() - 1)}
    val g = Array(N){ mutableSetOf<Int>() }
    for (i in E) {
      g[i.v].add(i.i)
      g[i.u].add(i.i)
    }
    val que = ArrayDeque<Int>() // node id
    for (i in 0 until N) {
      if (g[i].size == 1) que += i
    }

    val ans = IntArray(N){-1}
    val used = BooleanArray(N)
    while (que.isNotEmpty()) {
      val v = que.pop()
      val id = g[v].first()
      ans[id] = v
      used[v] = true
      for (u in intArrayOf(E[id].v, E[id].u)) {
        g[u].remove(id)
        if (g[u].size == 1) que += u
      }
    }

    val unq = mutableSetOf<Int>()
    var unassigned = 0
    for (i in 0 until N) {
      if (ans[i] == -1) {
        unq += E[i].v
        unq += E[i].u
        unassigned++
      }
    }

    if (unq.size != unassigned) {
      out.println("No")
    }
    else {
      fun dfs(v: Int, parEdge: Int) {
        for (id in g[v]) {
          if (id == parEdge) continue
          if (ans[id] == -1) {
            ans[id] = v
            used[v] = true
            val u = (E[id].v xor E[id].u) xor v
            dfs(u, id)
          }
        }
      }

      for (v in 0 until N) {
        if (!used[v]) {
          dfs(v, -1)
        }
      }

      out.println("Yes")
      ans.map { it + 1 }.forEach { out.println(it) }
    }
  }













































  private val isDebug = try {
    // なんか本番でエラーでる
    System.getenv("MY_DEBUG") != null
  } catch (t: Throwable) {
    false
  }

  private var tokenizer: StringTokenizer? = null
  private fun next(): String {
    while (tokenizer == null || !tokenizer!!.hasMoreTokens()) {
      tokenizer = StringTokenizer(reader.readLine())
    }
    return tokenizer!!.nextToken()
  }

  private fun ni() = next().toInt()
  private fun nl() = next().toLong()
  private fun ns() = next()
  private fun na(n: Int, offset: Int = 0): IntArray {
    return IntArray(n) { ni() + offset }
  }
  private fun nal(n: Int, offset: Int = 0): LongArray {
    val res = LongArray(n)
    for (i in 0 until n) {
      res[i] = nl() + offset
    }
    return res
  }

  private fun na2(n: Int, offset: Int = 0): Array<IntArray> {
    val a  = Array(2){IntArray(n)}
    for (i in 0 until n) {
      for (e in a) {
        e[i] = ni() + offset
      }
    }
    return a
  }

  private inline fun debug(msg: () -> String) {
    if (isDebug) System.err.println(msg())
  }

  /**
   * コーナーケースでエラー出たりするので、debug(dp[1])のように添え字付きの場合はdebug{}をつかうこと
   */
  private inline fun debug(a: LongArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: IntArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: BooleanArray) {
    debug { toString(a) }
  }

  private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}

  private inline fun debugDim(A: Array<LongArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<IntArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<BooleanArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }

  /**
   * 勝手にimport消されるのを防ぎたい
   */
  private fun hoge() {
    min(1, 2)
    max(1, 2)
    abs(-10)
  }

  private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
  private inline fun assert(b: Boolean, f: () -> String) = run{if (!b) throw AssertionError(f())}

  companion object {
    // TestRunnerから呼びたいので単純なmainじゃだめ
    fun main() {
      val out = java.io.PrintWriter(System.out)
      Solver(System.`in`, out).solve()
      out.flush()
    }
  }
}

/**
 * judgeから呼ばれる
 */
fun main() = Solver.main()