백준 16933번 반복수 Kotlin

https://www.acmicpc.net/problem/16933

문제

---

생각하기

---

동작

결과

코드

---

import java.io.File
import java.util.StringTokenizer

// input
private var br = System.`in`.bufferedReader()

// variables
private var A: Long = 0
private var B: Long = 0
private var K = 0
private var M: Long = 0

fun main() {
    val bw = System.out.bufferedWriter()

    input()

    bw.write(solve())
    bw.close()
} // End of main()

private fun solve(): String {
    val sb = StringBuilder()

    var ans: Long = 0
    var start: Long = Math.pow(10.0, (K - 1).toDouble()).toLong()
    var end: Long = (Math.pow(10.0, K.toDouble()) - 1).toLong()

    var i: Long = 0
    for (i in start..end) {
        var str = i.toString()
        var cur = i
        var idx = 0

        while (cur <= B) {
            if (A <= cur && cur <= B && cur % M == 0L) {
                ans++
            }

            cur = cur * 10 + (str[idx] - '0')
            idx = (idx + 1) % str.length
        }
    }

    sb.append(ans)
    return sb.toString()
} // End of solve()

private fun input() {
    StringTokenizer(br.readLine()).run {
        A = nextToken().toLong()
        B = nextToken().toLong()
        K = nextToken().toInt()
        M = nextToken().toLong()
    }
} // End of input()