提出 #14748067

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ソースコード 拡げる

import java.io.BufferedReader

fun main() {
    val br = System.`in`.bufferedReader()
    val n = br.readInt()
    val sieve = IntArray(n + 1) { -1 }
    var sum = 1L
    for (x in 2..n) {
        if (sieve[x] == -1) {
            sieve[x] = x
            if (x < 3163) {
                var y = x * x
                while (y <= n) {
                    sieve[y] = x
                    y += x
                }
            }
        }
        var numFactors = 1L
        var num = x
        while (sieve[num] != -1) {
            val p = sieve[num]
            var ct = 0
            while (num % p == 0) {
                num /= p
                ct++
            }
            numFactors *= (ct + 1)
        }
        sum += x * numFactors
    }
    print(sum)
}

private const val SPACE_INT = ' '.toInt()
private const val ZERO_INT = '0'.toInt()
private const val NL_INT = '\n'.toInt()

private fun BufferedReader.readInt(): Int {
    var ret = read()
    while (ret <= SPACE_INT) {
        ret = read()
    }
    val neg = ret == '-'.toInt()
    if (neg) {
        ret = read()
    }
    ret -= ZERO_INT
    var read = read()
    while (read >= ZERO_INT) {
        ret *= 10
        ret += read - ZERO_INT
        read = read()
    }

    while (read <= SPACE_INT && read != -1 && read != NL_INT) {
        mark(1)
        read = read()
    }
    if (read > SPACE_INT) {
        reset()
    }
    return if (neg) -ret else ret
}

提出情報

コンパイルエラー

warning: ATTENTION!
This build uses unsafe internal compiler arguments:

-XXLanguage:+InlineClasses

This mode is not recommended for production use,
as no stability/compatibility guarantees are given on
compiler or generated code. Use it at your own risk!

ジャッジ結果