結果

問題 No.1645 AB's abs
ユーザー 箱星箱星
提出日時 2021-08-13 21:54:03
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 496 ms / 2,000 ms
コード長 2,719 bytes
コンパイル時間 15,647 ms
コンパイル使用メモリ 460,684 KB
実行使用メモリ 90,728 KB
最終ジャッジ日時 2024-10-03 18:37:42
合計ジャッジ時間 33,292 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge2
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 302 ms
58,424 KB
testcase_01 AC 303 ms
58,484 KB
testcase_02 AC 347 ms
61,104 KB
testcase_03 AC 293 ms
58,332 KB
testcase_04 AC 294 ms
58,248 KB
testcase_05 AC 296 ms
58,504 KB
testcase_06 AC 296 ms
58,368 KB
testcase_07 AC 292 ms
58,348 KB
testcase_08 AC 340 ms
60,860 KB
testcase_09 AC 355 ms
62,944 KB
testcase_10 AC 335 ms
60,980 KB
testcase_11 AC 346 ms
60,868 KB
testcase_12 AC 346 ms
60,988 KB
testcase_13 AC 462 ms
90,504 KB
testcase_14 AC 393 ms
77,500 KB
testcase_15 AC 445 ms
90,572 KB
testcase_16 AC 447 ms
86,312 KB
testcase_17 AC 463 ms
86,312 KB
testcase_18 AC 468 ms
84,268 KB
testcase_19 AC 462 ms
86,292 KB
testcase_20 AC 413 ms
77,452 KB
testcase_21 AC 469 ms
84,356 KB
testcase_22 AC 464 ms
86,324 KB
testcase_23 AC 467 ms
86,524 KB
testcase_24 AC 466 ms
90,504 KB
testcase_25 AC 486 ms
90,508 KB
testcase_26 AC 469 ms
86,576 KB
testcase_27 AC 471 ms
90,684 KB
testcase_28 AC 468 ms
88,596 KB
testcase_29 AC 467 ms
90,456 KB
testcase_30 AC 471 ms
90,444 KB
testcase_31 AC 480 ms
90,700 KB
testcase_32 AC 475 ms
90,588 KB
testcase_33 AC 479 ms
90,564 KB
testcase_34 AC 466 ms
90,728 KB
testcase_35 AC 477 ms
90,700 KB
testcase_36 AC 496 ms
90,648 KB
testcase_37 AC 479 ms
90,688 KB
testcase_38 AC 335 ms
58,944 KB
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ソースコード

diff # 

import java.io.PrintWriter
import java.util.*
import kotlin.math.*

fun PrintWriter.solve() {
    val n = nextInt()
    val a = Array(n) { nextInt() }
    var map = mutableMapOf<Int, ModInt>()
    map[0] = ModInt(1)
    for (i in 0 until n) {
        val map2 = mutableMapOf<Int, ModInt>()
        for (k in map.keys) {
            map2[k + a[i]] = (map2[k + a[i]] ?: ModInt(0)) + map[k]!!
            val v = (k - a[i]).absoluteValue
            map2[v] = (map2[v] ?: ModInt(0)) + map[k]!!
        }
        map = map2
    }
    var ans = ModInt(0)
    for ((k, v) in map) {
        ans += k.toModInt() * v
    }
    println(ans)
}

// region ModInt
class ModInt(x: Long) {
    companion object {
        //const val MOD = 1000000007L
        const val MOD = 998244353L
    }

    constructor(y: Int) : this(y.toLong())

    val x = (x % MOD + MOD) % MOD

    operator fun plus(other: ModInt): ModInt {
        return ModInt(x + other.x)
    }

    operator fun minus(other: ModInt): ModInt {
        return ModInt(x - other.x)
    }

    operator fun times(other: ModInt): ModInt {
        return ModInt(x * other.x)
    }

    operator fun div(other: ModInt): ModInt {
        return this * other.inv()
    }

    fun pow(exp: Long): ModInt {
        if (exp == 0L) return ModInt(1L)
        var a = pow(exp shr 1)
        a *= a
        if (exp and 1L == 0L) return a
        return this * a
    }

    fun inv(): ModInt {
        return this.pow(MOD - 2)
    }

    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (javaClass != other?.javaClass) return false

        other as ModInt

        if (x != other.x) return false

        return true
    }

    override fun hashCode(): Int {
        return x.hashCode()
    }

    override fun toString(): String {
        return "$x"
    }
}

fun Long.toModInt(): ModInt {
    return ModInt(this)
}

fun Int.toModInt(): ModInt {
    return ModInt(this)
}

fun binomSimple(n: Long, k: Long): ModInt {
    var numer = ModInt(1)
    var denom = ModInt(1)
    for (i in 0 until k) {
        numer *= ModInt(n - i)
        denom *= ModInt(k - i)
    }
    return numer / denom
}
// endregion

fun main() {
    Thread(null, {
        val writer = PrintWriter(System.out, false)
        writer.solve()
        writer.flush()
    }, "solve", 1.shl(26)).start()
}

// region Scanner
private var st = StringTokenizer("")
private val br = System.`in`.bufferedReader()

fun next(): String {
    while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())
    return st.nextToken()
}

fun nextInt() = next().toInt()
fun nextLong() = next().toLong()
fun nextLine() = br.readLine()
fun nextDouble() = next().toDouble()
// endregion
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