ver. Success : https://gist.github.com/lala7573/37cf28a00d93c4e3ff77

BadHorse_FAIL.scala

package greeter

import scala.collection.mutable
import scala.io.Source
import java.io.{ File, PrintStream }

/**
   *  test case마다 map초기화 && (str2 + elem) => (str2 = str2 + (elem)) 문제로 안됨.. 
   *  description에 testcase를 둘다 통과한 소스의 링크를 걸어놓음 
   */
object hello extends App {
  
  var map: mutable.HashMap[String, Boolean] = mutable.HashMap.empty[String, Boolean]
  
  def isBipartiteGraph(str: String): Boolean = {
    val lines = str.split("\n")
    check(lines)
  }

  def check(lines: Array[String]) : Boolean= {
    
    var str2 = ""
    for (i <- 0 to lines.length - 1) yield {

      val names = lines(i).split(" ")

      if ( map == null ) {
        map = mutable.HashMap.empty[String, Boolean]
        map += (names(0) -> false)
        map += (names(1) -> true)
      }

      
      //0없음 
      if (!map.contains(names(0))) {
        //1 있음 
        if (map.contains(names(1))) {
          map += (names(0) -> !map(names(1)))
        } //1 없음 
        else {
          str2.+(lines(i) + "\n")
        }
        //0있음 
      } else {
        // 1없음  
        if (!map.contains(names(1))) {
          map += (names(1) -> !map(names(0)))
        
        } // 1있음   
        else {
          if (!map(names(0)) != map(names(1))) {
            return false
          }
        }
      }
    }
    if (str2 != "") check(str2.split("\n"))
    else if (str2.split("\n").equals(lines)) {
      map = mutable.HashMap.empty[String, Boolean]
      check(str2.split("\n"))
    }
    else true
  }

  def setting(iter: Iterator[String])(pr: String => Unit) {

    for (i <- 1 to iter.next().toInt) yield {
      var seq: String = ""
      for (j <- 1 to iter.next().toInt) yield {
        seq = seq.+(iter.next().toString + "\n")
      }
      pr(s"Case #$i: ${if (isBipartiteGraph(seq)) "Yes" else "No"}")
    }
  }

  override def main(args: Array[String]) {
    val in = Source.fromFile(new File("src/A-small-practice-1.in"))
    val out = new PrintStream(new File("src/test.out"))
    try {
      setting(in.getLines) { s: String => out.println(s) }
    } finally {
      out.flush; out.close
    }
  }
}