Here are the first two solutions I wrote in Scala:
import java.io.BufferedReader
import scala.io.Source
/**
* Created by meir on 06/04/19.
*/
object Solution {
val not4 = "[^4]".r
def processTest(in: BufferedReader): String = {
val n = in.readLine()
val a =
not4.replaceAllIn(n,"0").replaceAllLiterally("4","1").dropWhile(_ == '0')
val b = n.replaceAllLiterally("4","3")
a + " " + b
}
def main(args: Array[String]) {
val in = Source.stdin.bufferedReader()
val N = in.readLine().toInt
Range(1, N + 1).foreach(i => printf("Case #%d: %s\n", i,
processTest(in)))
}
}
import java.io.BufferedReader
import scala.io.Source
/**
* Created by meir on 06/04/19.
*/
object Solution {
def not(c: Char) = if (c == 'E') 'S' else 'E'
def processTest(in: BufferedReader): String = {
val n = in.readLine().toInt
val p = in.readLine()
if (p.head != p.last) {
(Seq.fill(n-1)(p.last) ++
Seq.fill(n-1)(p.head)).mkString("")
} else {
val a=p.head
val b=not(p.head)
val c=p.indexOf(""+b+b)
val cnt=p.substring(0,c).count(_ == b)
(Seq.fill(cnt+1)(b) ++ Seq.fill(n-1)(a) ++ Seq.fill(n -
cnt - 2)(b)).mkString("")
}
}
def main(args: Array[String]) {
val in = Source.stdin.bufferedReader()
val N = in.readLine().toInt
Range(1, N + 1).foreach(i => printf("Case #%d: %s\n", i,
processTest(in)))
}
}
Scala is not a slow language, I believe it's almost entirely compile and
startup time issues.
Problem B can be done simpler, but this is what I wrote at the time, and it
should be plenty fast enough.
Equivalent Java programs (Regex and all) worked without issue. By problem three
I already got the hint and solved in Java first and not in Scala.
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