結果
| 問題 |
No.1693 Invasion
|
| コンテスト | |
| ユーザー |
ポール
|
| 提出日時 | 2021-10-01 23:41:32 |
| 言語 | Kotlin (2.1.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,242 bytes |
| コンパイル時間 | 16,876 ms |
| コンパイル使用メモリ | 462,256 KB |
| 実行使用メモリ | 130,900 KB |
| 最終ジャッジ日時 | 2024-07-19 16:50:57 |
| 合計ジャッジ時間 | 26,043 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 6 TLE * 1 -- * 14 |
コンパイルメッセージ
Main.kt:6:10: warning: variable 'n' is never used
val (n, m) = readLine()!!.split(" ").map(String::toInt)
^
Main.kt:8:9: warning: variable 'amin' is never used
val amin = a.first()
^
Main.kt:101:13: warning: name shadowed: e
var e = e
^
ソースコード
import java.util.*
fun main() {
val ONE = ModInt(1)
val (n, m) = readLine()!!.split(" ").map(String::toInt)
var a = readLine()!!.splitToSequence(" ").map(String::toInt).toSortedSet()
val amin = a.first()
val frac = Array(m-1) {ONE}
for (i in 2..frac.lastIndex) {
frac[i] = frac[i-1] * i
}
val finv = Array(m-1) {ONE / frac[it]}
var canAll = false
var ans = ONE
var ts: SortedSet<Int> = sortedSetOf(0)
var newcomer: SortedSet<Int> = sortedSetOf(0)
for (s in 1 until m) {
a = a.subSet(0, m-ts.first()+1)
ts = ts.subSet(s, m).toSortedSet()
val tmp = newcomer
newcomer = sortedSetOf()
for (ai in a) {
for (t in tmp) {
val nxt = ai + t
if (nxt < s) continue
else if (nxt < m) {
newcomer.add(nxt)
ts.add(nxt)
}
else {
if (nxt == m) canAll = true
break
}
}
}
if (ts.isEmpty()) break
var sum = ModInt(0)
for (t in ts) {
sum += finv[t-s] * finv[m-t-1]
}
ans += sum * frac[m-s-1]
}
if (canAll) ans++
println(ans)
}
class ModInt {
val v: Long
constructor(v: Int) {
this.v = when {
v >= 0 -> v % MOD
else -> (v % MOD) + MOD
}
}
constructor(v: Long) {
this.v = when {
v >= 0 -> v % MOD
else -> (v % MOD) + MOD
}
}
override fun toString() = v.toString()
fun toInt() = v.toInt()
fun toLong() = v
override fun equals(other: Any?): Boolean {
return if (other is ModInt) v == other.v else false
}
override fun hashCode() = 31 * 17 + v.hashCode()
operator fun unaryPlus() = this
operator fun unaryMinus() = ModInt(-this.v)
private operator fun plus(o: Long) = ModInt(this.v + o)
operator fun plus(o: ModInt) = this.plus(o.v)
operator fun plus(o: Int) = this.plus(o.toLong())
private operator fun minus(o: Long) = ModInt(this.v - o)
operator fun minus(o: ModInt) = this.minus(o.v)
operator fun minus(o: Int) = this.minus(o.toLong())
private operator fun times(o: Long) = ModInt(this.v * o)
operator fun times(o: ModInt) = this.times(o.v)
operator fun times(o: Int) = this.times(o.toLong())
operator fun div(o: ModInt) = this.times(o.pow(MOD - 2))
operator fun div(o: Int) = this.times(o.powMod(MOD - 2))
operator fun inc() = this.plus(1)
operator fun dec() = this.minus(1)
fun pow(e: Long): ModInt {
assert(e >= 0)
if (this.v == 1L) return ModInt(1)
var ans = ModInt(1)
var b = this;
var e = e
while (e != 0L) {
if (e % 2 == 1L) ans *= b
b *= b
e /= 2
}
return ans
}
fun pow(e: Int) = pow(e.toLong())
companion object {
const val MOD = 998244353L
}
}
fun Long.powMod(e: Long) = ModInt(this).pow(e)
fun Long.powMod(e: Int) = ModInt(this).pow(e.toLong())
fun Int.powMod(e: Long) = ModInt(this).pow(e)
fun Int.powMod(e: Int) = ModInt(this).pow(e.toLong())
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