#799103 (Kotlin) No.2197 Same Dish

• 問題: No.2197 Same Dish
• ユーザー: 箱星
• 提出日時: 2022-09-19 18:20:29
• 言語: Kotlin (2.1.0)
• 結果: AC
• 実行時間: 793 ms / 2,000 ms
• コード長: 2,612 bytes
• コンパイル時間: 13,843 ms
• コンパイル使用メモリ: 457,172 KB
• 実行使用メモリ: 89,724 KB
• 最終ジャッジ日時: 2024-06-23 08:45:54
• 合計ジャッジ時間: 25,973 ms
• ジャッジサーバーID （参考情報）: judge2 / judge4

ファイルパターン	結果
sample	AC * 3
other	AC * 20

ソースコード

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fun main() {
    val (n, k) = nextInts()
    val customers = mutableListOf<Pair<Int, Int>>()
    for (i in 0 until n) {
        val (l, r) = nextInts()
        customers.add(l to r)
    }
    customers.sortBy { it.first }
    val bit = BIT(200005)
    var compl = ModInt(1)
    for ((l, r) in customers) {
        compl *= ModInt(k - bit.sum(l + 1 until 200005))
        bit.add(r, 1)
    }
    val ans = ModInt(k).pow(n.toLong()) - compl
    println(ans)
}
class BIT(private val n: Int) {
    private val data = LongArray(n) { 0 }
    fun add(i: Int, x: Long) {
        var p = i + 1
        while (p <= n) {
            data[p - 1] += x
            p += p and -p
        }
    }
    fun sum(range: IntRange): Long {
        val l = range.first
        val r = range.last + 1
        return sum(r) - sum(l)
    }
    private fun sum(i: Int): Long {
        var r = i
        var s = 0L
        while(r > 0) {
            s += data[r - 1]
            r -= r and -r
        }
        return s
    }
}
// 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 nextInts() = readln().split(" ").map { it.toInt() }
 
 
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