This commit is contained in:
krahets
2023-07-26 10:57:40 +08:00
parent 6381f16506
commit f8f7086196
52 changed files with 4032 additions and 0 deletions
+23
View File
@@ -213,3 +213,26 @@ comments: true
```dart title="top_k.dart"
[class]{}-[func]{top_k_heap}
```
=== "Rust"
```rust title="top_k.rs"
/* 基于堆查找数组中最大的 k 个元素 */
fn top_k_heap(nums: Vec<i32>, k: usize) -> BinaryHeap<Reverse<i32>> {
// Rust 的 BinaryHeap 是大顶堆,使用 Reverse 将元素大小反转
let mut heap = BinaryHeap::<Reverse<i32>>::new();
// 将数组的前 k 个元素入堆
for &num in nums.iter().take(k) {
heap.push(Reverse(num));
}
// 从第 k+1 个元素开始,保持堆的长度为 k
for &num in nums.iter().skip(k) {
// 若当前元素大于堆顶元素,则将堆顶元素出堆、当前元素入堆
if num > heap.peek().unwrap().0 {
heap.pop();
heap.push(Reverse(num));
}
}
heap
}
```