mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-29 04:16:28 +08:00
b2f0d4603d
* Add Ruby and Kotlin icons Add the avatar of @curtishd * Update README * Synchronize zh-hant and zh versions. * Translate the pythontutor blocks to traditional Chinese * Fix en/mkdocs.yml * Update the landing page of the en version. * Fix the Dockerfile * Refine the en landingpage * Fix en landing page * Reset the README.md
66 lines
No EOL
1.6 KiB
Kotlin
66 lines
No EOL
1.6 KiB
Kotlin
/**
|
|
* File: heap.kt
|
|
* Created Time: 2024-01-25
|
|
* Author: curtishd (1023632660@qq.com)
|
|
*/
|
|
|
|
package chapter_heap
|
|
|
|
import utils.printHeap
|
|
import java.util.*
|
|
|
|
fun testPush(heap: Queue<Int>, _val: Int) {
|
|
heap.offer(_val) // 元素入堆積
|
|
print("\n元素 $_val 入堆積後\n")
|
|
printHeap(heap)
|
|
}
|
|
|
|
fun testPop(heap: Queue<Int>) {
|
|
val _val = heap.poll() // 堆積頂元素出堆積
|
|
print("\n堆積頂元素 $_val 出堆積後\n")
|
|
printHeap(heap)
|
|
}
|
|
|
|
/* Driver Code */
|
|
fun main() {
|
|
/* 初始化堆積 */
|
|
// 初始化小頂堆積
|
|
var minHeap = PriorityQueue<Int>()
|
|
|
|
// 初始化大頂堆積（使用 lambda 表示式修改 Comparator 即可）
|
|
val maxHeap = PriorityQueue { a: Int, b: Int -> b - a }
|
|
|
|
println("\n以下測試樣例為大頂堆積")
|
|
|
|
/* 元素入堆積 */
|
|
testPush(maxHeap, 1)
|
|
testPush(maxHeap, 3)
|
|
testPush(maxHeap, 2)
|
|
testPush(maxHeap, 5)
|
|
testPush(maxHeap, 4)
|
|
|
|
/* 獲取堆積頂元素 */
|
|
val peek = maxHeap.peek()
|
|
print("\n堆積頂元素為 $peek\n")
|
|
|
|
/* 堆積頂元素出堆積 */
|
|
testPop(maxHeap)
|
|
testPop(maxHeap)
|
|
testPop(maxHeap)
|
|
testPop(maxHeap)
|
|
testPop(maxHeap)
|
|
|
|
/* 獲取堆積大小 */
|
|
val size = maxHeap.size
|
|
print("\n堆積元素數量為 $size\n")
|
|
|
|
/* 判斷堆積是否為空 */
|
|
val isEmpty = maxHeap.isEmpty()
|
|
print("\n堆積是否為空 $isEmpty\n")
|
|
|
|
/* 輸入串列並建堆積 */
|
|
// 時間複雜度為 O(n) ，而非 O(nlogn)
|
|
minHeap = PriorityQueue(mutableListOf<Int?>(1, 3, 2, 5, 4))
|
|
println("\n輸入串列並建立小頂堆積後")
|
|
printHeap(minHeap)
|
|
} |