object Main {
  import java.io.{BufferedReader, InputStream, InputStreamReader}
  import java.util.StringTokenizer
  import scala.reflect.ClassTag

  def main(args: Array[String]): Unit = {
    val out = new java.io.PrintWriter(System.out)
    new Main(out, new InputReader(System.in)).solve()
    out.flush()
  }

  private val oj = System.getenv("ATCODER_DEBUG") == null
  def DEBUG(f: => Unit): Unit = {
    if (!oj){ f }
  }
  def debug(as: Array[Boolean]): Unit = if (!oj){ debug(as.map(x => if(x) "1" else "0").mkString) }
  def debug(as: Array[Int]): Unit = if (!oj){ debug(as.mkString(" ")) }
  def debug(as: Array[Long]): Unit =if (!oj){ debug(as.mkString(" ")) }
  def debugDim(m: Array[Array[Long]]): Unit = if (!oj){
    REP(m.length) { i =>
      debug(m(i))
    }
  }
  def debugDimFlip(m: Array[Array[Long]]): Unit = if (!oj){
    REP(m(0).length) { j =>
      REP(m.length) { i =>
        System.err.print(m(i)(j))
        System.err.print(" ")
      }
      System.err.println()
    }
  }
  def debug(s: => String): Unit = DEBUG {
    System.err.println(s)
  }
  def debugL(num: => Long): Unit = DEBUG {
    System.err.println(num)
  }

  class InputReader(val stream: InputStream) {
    private val reader = new BufferedReader(new InputStreamReader(stream), 32768)
    private var tokenizer: StringTokenizer = _

    def next(): String = {
      while (tokenizer == null || !tokenizer.hasMoreTokens)
        tokenizer = new StringTokenizer(reader.readLine)
      tokenizer.nextToken
    }

    def nextInt(): Int = Integer.parseInt(next())
    def nextLong(): Long = java.lang.Long.parseLong(next())
    def nextChar(): Char = next().charAt(0)

    def ni(): Int = nextInt()
    def nl(): Long = nextLong()
    def nc(): Char = nextChar()
    def ns(): String = next()
    def ns(n: Int): Array[Char] = ns().toCharArray
    def na(n: Int, offset: Int = 0): Array[Int] = map(n)(_ => ni() + offset)
    def na2(n: Int, offset: Int = 0): (Array[Int], Array[Int]) = {
      val A1, A2 = Array.ofDim[Int](n)
      REP(n) { i =>
        A1(i) = ni() + offset
        A2(i) = ni() + offset
      }
      (A1, A2)
    }
    def nm(n: Int, m: Int): Array[Array[Int]] = {
      val A = Array.ofDim[Int](n, m)
      REP(n) { i =>
        REP(m) { j =>
          A(i)(j) = ni()
        }
      }
      A
    }
    def nal(n: Int): Array[Long] = map(n)(_ => nl())
    def nm_c(n: Int, m: Int): Array[Array[Char]] = map(n) (_ => ns(m))
  }

  def REP(n: Int, offset: Int = 0)(f: Int => Unit): Unit = {
    var i = offset
    val N = n + offset
    while(i < N) { f(i); i += 1 }
  }
  def REP_r(n: Int, offset: Int = 0)(f: Int => Unit): Unit = {
    var i = n - 1 + offset
    while(i >= offset) { f(i); i -= 1 }
  }
  def TO(from: Int, to: Int)(f: Int => Unit): Unit = {
    REP(to - from + 1, from) { i =>
      f(i)
    }
  }
  def map[@specialized A: ClassTag](n: Int, offset: Int = 0)(f: Int => A): Array[A] = {
    val res = Array.ofDim[A](n)
    REP(n)(i => res(i) = f(i + offset))
    res
  }

  def sumL(as: Array[Int]): Long = {
    var s = 0L
    REP(as.length)(i => s += as(i))
    s
  }
  def cumSum(as: Array[Int]): Array[Long] = {
    val cum = Array.ofDim[Long](as.length + 1)
    REP(as.length) { i =>
      cum(i + 1) = cum(i) + as(i)
    }
    cum
  }

  case class Entry(x: Int, y: Int)
}

class Main(out: java.io.PrintWriter, sc: Main.InputReader) {
  import sc._
  import Main._
  import java.util.Arrays.sort

  import scala.collection.mutable
  import math.{abs, max, min}
  import mutable.ArrayBuffer

  // toIntとか+7とかするならvalにしろ
  @inline private def MOD = 998244353

  def solve(): Unit = {
    import java.util
    import java.util.Comparator
    val N = ni()
    val E = Array.ofDim[Entry](N)
    val X = Array.ofDim[Int](N)
    REP(N) { i =>
      E(i) = Entry(ni(), ni())
      X(i) = E(i).x
    }
    sort(X)

    def zip(x: Int): Int = lb(X, x)

    sort(E, new Comparator[Entry] {
      override def compare(o1: Entry, o2: Entry): Int = Integer.compare(o1.y, o2.y)
    })

    val pow2 = Array.ofDim[Long](N)
    pow2(0) = 1
    REP(pow2.length - 1)(i => pow2(i + 1) = pow2(i) * 2 % MOD)

    var ans = 0L
    val bit1 = new BIT(N, 0)(_ + _)
    val downL = Array.ofDim[Int](N)
    REP(N) { i =>
      val xid = zip(E(i).x)
      val l = bit1.sum(xid + 1)
      downL(i) = l
      bit1.add(xid, 1)
    }

    val bit2 = new BIT(N, 0)(_ + _)
    val t2 = new util.TreeSet[Int]()
    val upL = Array.ofDim[Int](N)
    REP_r(N) { i =>
      val xid = zip(E(i).x)
      val l = bit2.sum(xid + 1)
      upL(i) = l
      bit2.add(xid, 1)
    }

    REP(N) { i =>
      val upR = N - 1 - i - upL(i)
      val downR = i - downL(i)
//      ans += downL(i).toLong * upR + downR.toLong * upL(i)

      ans += (MOD + pow2(downL(i)) - 1) % MOD * (MOD + pow2(upR) - 1) % MOD *
        pow2(downR + upL(i)) % MOD

      ans += pow2(downL(i) + upR) *
        (MOD + pow2(downR) - 1) % MOD * (MOD + pow2(upL(i)) - 1) % MOD

      ans = MOD + ans - (MOD + pow2(downL(i)) - 1) % MOD * (MOD + pow2(upR) - 1) % MOD *
        (MOD + pow2(downR) - 1) % MOD * (MOD + pow2(upL(i)) - 1) % MOD

      debug(s"upR:$upR upL${upL(i)} downR:$downR downL:${downL(i)}")

      ans %= MOD
    }

    debug(downL)
    debug(upL)

    val NN = N

    def powMod(x: Int, n: Int, m: Int): Int = {
      def step(x: Long, n: Int, stack: Long): Long = {
        n match {
          case 0 => stack
          case _ => step(x * x % m, n / 2, if (n % 2 == 1) stack * x % m else stack)
        }
      }
      step(x, n, 1).toInt
    }

    val F = Array.ofDim[Long](NN + 1)
    F(0) = 1
    REP(NN) { i =>
      F(i + 1) = F(i) * (i + 1) % MOD
    }
    val I = Array.ofDim[Long](F.length)
    I(NN) = powMod(F(NN).toInt, MOD - 2, MOD)

    // x! = x(x-1)!
    // x!I(x!) ≡ (x-1)!I((x-1)!)
    // I((x-1)!) ≡ I(x!) * x   MODがでかいので(x-1)!はMODと素
    REP_r(NN) { i =>
      I(i) = I(i + 1) * (i + 1) % MOD
    }

    def comb(n: Int, k: Int): Long = {
      if (n < k) 0
      else F(n) * I(n - k) % MOD * I(k) % MOD
    }

    REP(N, 1) { i =>
      ans = (ans + i * comb(N, i)) % MOD
    }

    out.println(ans)
  }

  class BIT(n: Int, zero: Int)(f: (Int, Int) => Int) {
  def this(n: Int) = this(n, 0)(_ + _)

  private val N = {
    val a = Integer.highestOneBit(n)
    if (a == n) a else a << 1
  }
  private val bit = if (zero != 0) Array.fill[Int](N + 1)(zero) else Array.ofDim[Int](N + 1)

  /**
    * 1 index
    * addとindex違うよ
    * cumsumなんかといっしょ
    */
  def sum(i: Int): Int = {
    assert(i <= n)
    var x = i
    var s: Int = zero
    while(x > 0) {
      s = f(s, bit(x))
      x -= x & -x
    }
    s
  }

  /**
    * 0 index
    */
  def add(i: Int, a: Int): Unit = {
    assert(i < n)
    var x = i + 1
    while(x <= N) {
      bit(x) = f(bit(x), a)
      x += x & -x
    }
  }

  def sumAll: Int = sum(n)

  /**
    * [l, r)
    */
  def query(l: Int, r: Int)(sub: (Int, Int) => Int): Int = {
    assert(r > l)
    sub(sum(r), sum(l))
  }

  def lowerBound(W: Int)(sub: (Int, Int) => Int, lt: (Int, Int) => Boolean): Int = {
    var k = N
    var x = 0
    var w = W
    while(k > 0) {
      if (x + k <= N && lt(bit(x + k), w)) {
        w = sub(w, bit(x + k))
        x += k
      }
      k /= 2
    }
    x
  }
}
  def lb(a: Array[Int], x: Int): Int = {
    def step(l: Int, h: Int): Int = {
      if (h - l == 1) h
      else {
        val mid = (l + h) / 2
        if (a(mid) >= x) step(l, mid)
        else step(mid, h)
      }
    }

    step(-1, a.length)
  }
}