//import java.util.Scanner import scala.collection.Searching._ import scala.annotation.tailrec import scala.collection.mutable import scala.collection.immutable._ import scala.io.StdIn.readLine import java.io._ import java.nio.file.{Files, Path} import java.util.StringTokenizer import scala.io.Codec /** * Scala implementation of a faster java.util.Scanner * See: http://codeforces.com/blog/entry/7018 */ class Scanner(reader: LineNumberReader) extends Iterable[String] with AutoCloseable { def this(reader: BufferedReader) = this(new LineNumberReader(reader)) def this(reader: Reader) = this(new BufferedReader(reader)) def this(inputStream: InputStream)(implicit codec: Codec) = this(new InputStreamReader(inputStream, codec.charSet)) def this(path: Path)(implicit codec: Codec) = this(Files.newBufferedReader(path, codec.charSet)) def this(file: File)(implicit codec: Codec) = this(file.toPath)(codec) def this(str: String) = this(new StringReader(str)) override def iterator = for { line <- Iterator.continually(reader.readLine()).takeWhile(_ != null) tokenizer = new StringTokenizer(line) tokens <- Iterator.continually(tokenizer).takeWhile(_.hasMoreTokens) } yield tokens.nextToken() private[this] var current = iterator def hasNext = current.hasNext @inline def next() = current.next() /** * This is different from Java's scanner.nextLine * The Java one is a misnomer since it actually travel to end of current line * This one actually does fetch the next line */ def nextLine(): String = { val line = reader.readLine() current = iterator line } def lineNumber: Int = reader.getLineNumber def nextString(): String = next() def nextBoolean(): Boolean = next().toBoolean def nextByte(radix: Int = 10): Byte = java.lang.Byte.parseByte(next(), radix) def nextShort(radix: Int = 10): Short = java.lang.Short.parseShort(next(), radix) def nextInt(radix: Int = 10): Int = java.lang.Integer.parseInt(next(), radix) def nextLong(radix: Int = 10): Long = java.lang.Long.parseLong(next(), radix) def nextBigInt(radix: Int = 10): BigInt = BigInt(next(), radix) def nextFloat(): Float = next().toFloat def nextDouble(): Double = next().toDouble def nextBigDecimal(): BigDecimal = BigDecimal(next()) override def close() = reader.close() } class IUnionFind(val size: Int) { private case class Node(var parent: Option[Int], var treeSize: Int) private val nodes = Array.fill[Node](size)(new Node(None, 1)) def union(t1: Int, t2: Int): IUnionFind = { if (t1 == t2) return this val root1 = root(t1) val root2 = root(t2) if (root1 == root2) return this val node1 = nodes(root1) val node2 = nodes(root2) if (node1.treeSize < node2.treeSize) { node1.parent = Some(t2) node2.treeSize += node1.treeSize } else { node2.parent = Some(t1) node1.treeSize += node2.treeSize } this } def connected(t1: Int, t2: Int): Boolean = t1 == t2 || root(t1) == root(t2) def root(t: Int): Int = nodes(t).parent match { case None => t case Some(p) => { nodes(t).parent = Some(root(p)) nodes(t).parent.get } } } object Main { def solve(sc: => Scanner): Unit = { sc.nextInt() sc.nextInt() val S, T = sc.next.groupBy(c => c) println(math.min(S.get('A').getOrElse("").length, T.get('A').getOrElse("").length) + math.min(S.get('B').getOrElse("").length, T.get('B').getOrElse("").length)) } def recursive(A: Array[Array[Long]], pq: mutable.PriorityQueue[(Long, Int)], used: Set[Int]): Long = { if (pq.length == 0) (0) else { val now = pq.dequeue() (if (used.contains(now._2)) (0) else { for (i <- 0 until A(now._2).size) { if (A(now._2)(i) != -1) (pq.enqueue((A(now._2)(i), i))) } now._1 }) + recursive(A, pq, used + now._2) } } def recursive2(N: Long): String = { if (N == 0) ("") else (('a'.toInt + (N % 26)).toChar + recursive2(N / 26)) } def check(A: Array[List[Int]]): Boolean = { A.map(_.size == 0).fold(true)((a, b) => a & b) } def shift(n: Long): Long = { if (n == 0) (0) else if (n == 1) (1) else (shift(n - 1) << 1) } def unShift(n: Long): Long = { if (n == 0) (0) else (unShift(n >> 1) + 1) } def gcd(i: Long, j: Long): Long = { if (i < j) (gcd(j, i)) else (if (j == 0) (i) else (gcd(j, i % j))) } def main(args: Array[String]): Unit = { val sc: Scanner = new Scanner(System.in) solve(sc) } } object Util { def getPermutation(begin: Long = 0): Stream[Long] = Stream.cons(begin, getPermutation(begin + 1)) def getPrimeList(): Stream[Long] = getPrimeListRecursive(getPermutation(begin = 2)) private def getPrimeListRecursive(A: Stream[Long]): Stream[Long] = Stream.cons(A.head, getPrimeListRecursive(A.tail.filter(_ % A.head != 0))) def fib(a: Long = 0, b: Long = 1, mod: Long = Long.MaxValue): Stream[Long] = a #:: fib(b % mod, (a + b) % mod, mod) } object ArabicRoman { type =?>[A, B] = PartialFunction[A, B] val codeTable = List( (1000, "M"), (900, "CM"), (500, "D"), (400, "CD"), (100, "C"), (90, "XC"), (50, "L"), (40, "XL"), (10, "X"), (9, "IX"), (5, "V"), (4, "IV"), (1, "I")) val arabicToRoman: (Int) =?> String = { case src if (src >= 1 && src <= 3999) => { def convert(left: Int, cont: String = "", code: List[(Int, String)] = codeTable): String = { val (unitVal, unitChar) = code.head left - unitVal match { case n if (n == 0) => cont + unitChar case n if (n > 0) => convert(n, cont + unitChar, code) case _ => convert(left, cont, code.tail) } } convert(src) } } val romanToArabic: (String) =?> Int = { case src if (Option(src).exists { s => { s.nonEmpty && ("""[^MDCLXVI]""".r.findFirstMatchIn(s.toUpperCase) == None) } }) => { def convert(left: String, cont: Int = 0, code: List[(Int, String)] = codeTable): Int = { val (unitVal, unitChar) = code.head left.splitAt(unitChar.length) match { case ("", _) => cont case (`unitChar`, tail) => convert(tail, cont + unitVal, code) case _ => convert(left, cont, code.tail) } } convert(src.toUpperCase()) } } }