結果
| 問題 |
No.848 なかよし旅行
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-07-25 06:59:14 |
| 言語 | Kotlin (2.1.0) |
| 結果 |
AC
|
| 実行時間 | 868 ms / 2,000 ms |
| コード長 | 2,067 bytes |
| コンパイル時間 | 17,749 ms |
| コンパイル使用メモリ | 457,884 KB |
| 実行使用メモリ | 90,116 KB |
| 最終ジャッジ日時 | 2024-11-08 01:09:47 |
| 合計ジャッジ時間 | 32,049 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 26 |
コンパイルメッセージ
Main.kt:35:10: warning: parameter 'args' is never used
fun main(args: Array<String>) {
^
Main.kt:41:16: warning: 'toInt(): Int' is deprecated. Conversion of Char to Number is deprecated. Use Char.code property instead.
while ('0'.toInt() > buf[bufk]) bufk++;
^
Main.kt:42:16: warning: 'toInt(): Int' is deprecated. Conversion of Char to Number is deprecated. Use Char.code property instead.
while ('0'.toInt() <= buf[bufk]) {
^
Main.kt:43:41: warning: 'toLong(): Long' is deprecated. Conversion of Char to Number is deprecated. Use Char.code property instead.
ans = ans * 10 + (buf[bufk] - '0'.toLong())
^
ソースコード
import java.util.PriorityQueue
import java.util.Scanner
import java.io.BufferedReader
import java.io.InputStreamReader
data class Edge(val v: Int, val w: Long)
val INF = 1e18.toLong()
fun dijkstra(g: Array<MutableList<Edge>>, s: Int): Array<Long> {
data class State(val d: Long, val u: Int) : Comparable<State> {
override operator fun compareTo(other: State): Int {
if (d != other.d) return d.compareTo(other.d)
return u.compareTo(other.u)
}
}
var q: PriorityQueue<State> = PriorityQueue()
val n = g.size
var dist = Array(n, {INF})
dist[s] = 0
q.add(State(0, s))
while (!q.isEmpty()) {
val (d, u) = q.remove()
if (d > dist[u]) continue
for (e in g[u]) {
if (dist[e.v] > dist[u] + e.w) {
dist[e.v] = dist[u] + e.w
q.add(State(dist[e.v], e.v))
}
}
}
return dist
}
fun main(args: Array<String>) {
var buf: ByteArray = ByteArray(10000000, {0})
System.`in`.read(buf)
var bufk = 0
val readLong = fun(): Long {
var ans: Long = 0
while ('0'.toInt() > buf[bufk]) bufk++;
while ('0'.toInt() <= buf[bufk]) {
ans = ans * 10 + (buf[bufk] - '0'.toLong())
bufk++;
}
return ans
}
val readInt = fun(): Int = readLong().toInt()
val start = System.currentTimeMillis()
val N = readInt()
val M = readInt()
val P = readInt() - 1
val Q = readInt() - 1
val T = readLong()
var g = Array(N, {mutableListOf<Edge>()})
repeat(M) {
val u = readInt() - 1
val v = readInt() - 1
val w = readLong()
g[u].add(Edge(v, w))
g[v].add(Edge(u, w))
}
val end = System.currentTimeMillis()
System.err.println(end - start)
val d0 = dijkstra(g, 0)
val dp = dijkstra(g, P)
val dq = dijkstra(g, Q)
var ans = -INF
if (dp[0] + dp[Q] + dq[0] <= T) {
ans = T
}
for (i in 0..N-1) {
for (j in 0..N-1) {
if (d0[i] + d0[j] + maxOf(dp[i] + dp[j], dq[i] + dq[j]) <= T) {
ans = maxOf(ans, T - maxOf(dp[i] + dp[j], dq[i] + dq[j]))
}
}
}
if (ans < 0L) {
println(-1)
} else {
println(ans)
}
}