Codeforces Round #149 (Div. 2) (B)

gistfile1.scala

import java.util.Scanner

object Main extends App
{
	val cin=new Scanner(System.in)
	val n=cin.nextInt()
	val seg=(1<<30,0) :: List.tabulate(n)(_=>(cin.nextInt,cin.nextInt))
	val s=seg.reduce((a,b) => (math.min(a._1,b._1),math.max(a._2,b._2)))
	println(seg.indexOf(s))
}