結果
問題 | No.2794 I Love EDPC-T |
ユーザー | 箱星 |
提出日時 | 2023-01-31 09:49:33 |
言語 | Kotlin (1.9.23) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,112 bytes |
コンパイル時間 | 14,860 ms |
コンパイル使用メモリ | 467,220 KB |
実行使用メモリ | 308,504 KB |
最終ジャッジ日時 | 2024-05-30 16:24:18 |
合計ジャッジ時間 | 23,230 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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 | 271 ms
61,916 KB |
testcase_01 | AC | 259 ms
96,500 KB |
testcase_02 | AC | 265 ms
58,656 KB |
testcase_03 | AC | 258 ms
58,500 KB |
testcase_04 | AC | 262 ms
58,484 KB |
testcase_05 | AC | 257 ms
58,460 KB |
testcase_06 | AC | 817 ms
265,984 KB |
testcase_07 | TLE | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
ソースコード
import java.io.PrintWriter import java.util.* import kotlin.math.* fun PrintWriter.solve() { val n = nextInt() val s = nextLine() if (s.all { it == '>' }) { println(0) return } val dp = Array(n) { Array(n) { Array(2) { ModInt(0) } } } dp[0][0][0] = ModInt(1) for (i in 0 until n - 1) { for (j in 0..i) { if (s[i] == '>') { dp[i + 1][j][0] += dp[i][j][0] + dp[i][j][1] } dp[i + 1][j + 1][1] += dp[i][j][0] } } val c = Array(n + 1) { i -> binomSimple(2L * i, i.toLong()) / ModInt(i + 1) } var ans = ModInt(0) val p = s.count { it == '<' } % 2 for (i in 0 until n) { val num = c[n - i] * (dp[n - 1][i][0] + dp[n - 1][i][1]) if (i % 2 == p) { ans += num } else { ans -= num } } 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", abs(1L.shl(26))) .apply { setUncaughtExceptionHandler { _, e -> e.printStackTrace(); kotlin.system.exitProcess(1) } } .apply { start() }.join() } // 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