競プロ用テンプレその2

template.kt

import java.io.PrintWriter
import java.io.InputStream
fun main(){
    flush()
}

fun println(any: Any?){stdout.println(any)}
fun flush(){stdout.flush()}
fun readLine() = stdin.readLine()
fun readInt() = stdin.readInt()
fun readInts(n: Int) = IntArray(n){stdin.readInt()}
fun readIndices(n: Int) = IntArray(n){readInt().dec()}
fun readLong() = stdin.readLong()
fun readLongs(n: Int) = LongArray(n){readLong()}
fun readDouble() = stdin.readDouble()
fun readDoubles(n: Int) = DoubleArray(n){readDouble()}
val stdout = PrintWriter(System.`out`)
val stdin = Scanner(System.`in`)
class Scanner(val input: InputStream){
    val buf = ByteArray(4096)
    var ptr = 0
    var buflen = 0
    val EOF = 0.toChar()
    fun Byte.isPrintable() = this in 33..126
    fun Char.isPrintable() = this.toInt() in 33..126
    fun Char.toNum() = this - '0'
    fun hasNextByte() = if(ptr < buflen) true else {
        ptr = 0
        buflen = input.read(buf)
        buflen > 0
    }
    fun readChar() = if(hasNextByte()) buf[ptr++].toChar() else EOF
    fun skip(){
        while(hasNextByte() && !buf[ptr].isPrintable()) ptr++
        if(!hasNextByte()) error("reached to EOF")
    }
    fun readLine() = buildString{
        skip()
        var c = readChar()
        while(c != EOF && !c.isISOControl()){
            append(c)
            c = readChar()
        }
    }
    fun readString() = buildString{
        skip()
        var c = readChar()
        while(c != EOF && c.isPrintable()){
            append(c)
            c = readChar()
        }
    }
    fun readLong(): Long {
        skip()
        var n = 0L
        var neg = false
        var c = readChar()
        if(c == '-'){
            neg = true
            c = readChar()
        }
        while(c != EOF && c.isPrintable()){
            if(!c.isDigit()) throw NumberFormatException()
            n *= 10L
            n += c.toNum()
            c = readChar()
        }
        return if(neg) -n else n
    }
    fun readInt() = readLong().let{
        if(it in Int.MIN_VALUE..Int.MAX_VALUE) it.toInt()
        else throw NumberFormatException("$it is out of Int range")
    }
    fun readDouble(): Double {
        skip()
        var n = 0.0
        var neg = false
        var c = readChar()
        if(c == '-'){
            neg = true
            c = readChar()
        }
        while(c != EOF && c.isDigit()){
            if(c == '.') break
            if(!c.isDigit()) throw NumberFormatException()
            n = n * 10 + c.toNum()
            c = readChar()
        }
        if(c == '.'){
            var denom = 10.0
            c = readChar()
            while(c != EOF && c.isPrintable()){
                if(!c.isDigit()) throw NumberFormatException()
                n += c.toNum() / denom
                denom *= 10L
                c = readChar()
            }
        }
        return if(neg) -n else n
    }
}