結果
| 問題 |
No.1646 Avoid Palindrome
|
| コンテスト | |
| ユーザー |
 yakamoto
|
| 提出日時 | 2021-08-13 23:29:54 |
| 言語 | Kotlin (2.1.0) |
| 結果 |
AC
|
| 実行時間 | 837 ms / 3,000 ms |
| コード長 | 4,630 bytes |
| コンパイル時間 | 18,169 ms |
| コンパイル使用メモリ | 473,156 KB |
| 実行使用メモリ | 81,200 KB |
| 最終ジャッジ日時 | 2024-11-08 16:03:09 |
| 合計ジャッジ時間 | 48,014 ms |
|
ジャッジサーバーID （参考情報） |
judge3 / judge2 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 40 |
コンパイルメッセージ
Main.kt:178:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debug(a: LongArray) {
^
Main.kt:182:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debug(a: IntArray) {
^
Main.kt:186:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debug(a: BooleanArray) {
^
Main.kt:190:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}
^
Main.kt:192:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debugDim(A: Array<LongArray>) {
^
Main.kt:199:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debugDim(A: Array<IntArray>) {
^
Main.kt:206:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun debugDim(A: Array<BooleanArray>) {
^
Main.kt:223:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
^
ソースコード
import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.lang.AssertionError
import java.util.*
import kotlin.math.abs
import kotlin.math.max
import kotlin.math.min
val MOD = 998244353
fun powMod(a: Long, n: Long, mod: Int): Long {
if (n == 0L) return 1
val res = powMod(a * a % mod, n / 2, mod)
return if (n % 2 == 1L) res * a % mod else res
}
class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
private val reader = BufferedReader(InputStreamReader(stream), 32768)
fun solve() {
val N = ni()
val S = ns()
val R = 28
var cur = Array(2){LongArray(R*R)}
var next = Array(2){LongArray(R*R)}
cur[0][26*R + 27] = 1
fun countPal(): Long {
for (i in 0 until N) {
next[0].fill(0)
next[1][0] = 0
val sum1 = LongArray(R)
val sum2 = LongArray(R)
for (c1 in 0 until R) {
for (c2 in 0 until R) {
val s = c1 * R + c2
sum1[c1] += cur[0][s]
sum2[c2] += cur[0][s]
}
}
debug{"i:$i"}
debug(sum1)
debug(sum2)
fun doIt(c3: Int) {
next[1][0] += sum1[c3] + sum2[c3]
for (c2 in 0 until R) {
if (c2 == c3) continue
next[0][c2*R + c3] += sum2[c2] + MOD - (cur[0][c3*R+c2])%MOD
}
}
if (S[i] == '?') {
for (c3 in 0 until 26) {
doIt(c3)
next[1][0] += cur[1][0]
}
}
else {
val c3 = S[i]-'a'
doIt(c3)
next[1][0] += cur[1][0]
}
for (c1 in 0 until R) {
for (c2 in 0 until R) {
val s = c1*R + c2
next[0][s] = next[0][s] % MOD
next[1][0] = next[1][0] % MOD
}
}
val tmp = cur
cur = next
next = tmp
}
return cur[1][0]
}
val M = S.count{it == '?'}
val ans = (powMod(26, M.toLong(), MOD) + (MOD - countPal())) % MOD
out.println(ans)
}
private val isDebug = try {
// なんか本番でエラーでる
System.getenv("MY_DEBUG") != null
} catch (t: Throwable) {
false
}
private var tokenizer: StringTokenizer? = null
private fun next(): String {
while (tokenizer == null || !tokenizer!!.hasMoreTokens()) {
tokenizer = StringTokenizer(reader.readLine())
}
return tokenizer!!.nextToken()
}
private fun ni() = next().toInt()
private fun nl() = next().toLong()
private fun ns() = next()
private fun na(n: Int, offset: Int = 0): IntArray {
return IntArray(n) { ni() + offset }
}
private fun nal(n: Int, offset: Int = 0): LongArray {
val res = LongArray(n)
for (i in 0 until n) {
res[i] = nl() + offset
}
return res
}
private fun na2(n: Int, offset: Int = 0): Array<IntArray> {
val a = Array(2){IntArray(n)}
for (i in 0 until n) {
for (e in a) {
e[i] = ni() + offset
}
}
return a
}
private inline fun debug(msg: () -> String) {
if (isDebug) System.err.println(msg())
}
/**
* コーナーケースでエラー出たりするので、debug(dp[1])のように添え字付きの場合はdebug{}をつかうこと
*/
private inline fun debug(a: LongArray) {
debug { a.joinToString(" ") }
}
private inline fun debug(a: IntArray) {
debug { a.joinToString(" ") }
}
private inline fun debug(a: BooleanArray) {
debug { toString(a) }
}
private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}
private inline fun debugDim(A: Array<LongArray>) {
if (isDebug) {
for (a in A) {
debug(a)
}
}
}
private inline fun debugDim(A: Array<IntArray>) {
if (isDebug) {
for (a in A) {
debug(a)
}
}
}
private inline fun debugDim(A: Array<BooleanArray>) {
if (isDebug) {
for (a in A) {
debug(a)
}
}
}
/**
* 勝手にimport消されるのを防ぎたい
*/
private fun hoge() {
min(1, 2)
max(1, 2)
abs(-10)
}
private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
private inline fun assert(b: Boolean, f: () -> String) = run{if (!b) throw AssertionError(f())}
companion object {
// TestRunnerから呼びたいので単純なmainじゃだめ
fun main() {
val out = java.io.PrintWriter(System.out)
Solver(System.`in`, out).solve()
out.flush()
}
}
}
/**
* judgeから呼ばれる
*/
fun main() = Solver.main()