Add solution and test-cases for problem 3066

Author: 0xff-dev

leetcode/3001-3100/3066.Minimum-Operations-to-Exceed-Threshold-Value-II/README.md

@@ -1,28 +1,41 @@
 # [3066.Minimum Operations to Exceed Threshold Value II][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
+You are given a **0-indexed** integer array `nums`, and an integer `k`.
+
+In one operation, you will:
+
+- Take the two smallest integers `x` and `y` in nums.
+- Remove `x` and `y` from nums.
+- Add `min(x, y) * 2 + max(x, y)` anywhere in the array.
+
+**Note** that you can only apply the described operation if `nums` contains at least two elements.
+
+Return the **minimum** number of operations needed so that all elements of the array are greater than or equal to `k`.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: nums = [2,11,10,1,3], k = 10
+Output: 2
+Explanation: In the first operation, we remove elements 1 and 2, then add 1 * 2 + 2 to nums. nums becomes equal to [4, 11, 10, 3].
+In the second operation, we remove elements 3 and 4, then add 3 * 2 + 4 to nums. nums becomes equal to [10, 11, 10].
+At this stage, all the elements of nums are greater than or equal to 10 so we can stop.
+It can be shown that 2 is the minimum number of operations needed so that all elements of the array are greater than or equal to 10.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Minimum Operations to Exceed Threshold Value II
-```go
 ```
-
+Input: nums = [1,1,2,4,9], k = 20
+Output: 4
+Explanation: After one operation, nums becomes equal to [2, 4, 9, 3].
+After two operations, nums becomes equal to [7, 4, 9].
+After three operations, nums becomes equal to [15, 9].
+After four operations, nums becomes equal to [33].
+At this stage, all the elements of nums are greater than 20 so we can stop.
+It can be shown that 4 is the minimum number of operations needed so that all elements of the array are greater than or equal to 20.
+```
 
 ## 结语
 

leetcode/3001-3100/3066.Minimum-Operations-to-Exceed-Threshold-Value-II/Solution.go

@@ -1,5 +1,47 @@
 package Solution
 
-func Solution(x bool) bool {
+import "container/heap"
+
+type heap3066 []int
+
+func (h *heap3066) Len() int {
+	return len(*h)
+}
+
+func (h *heap3066) Less(i, j int) bool {
+	return (*h)[i] < (*h)[j]
+}
+
+func (h *heap3066) Swap(i, j int) {
+	(*h)[i], (*h)[j] = (*h)[j], (*h)[i]
+}
+
+func (h *heap3066) Push(x any) {
+	*h = append(*h, x.(int))
+}
+
+func (h *heap3066) Pop() any {
+	old := *h
+	l := len(old)
+	x := old[l-1]
+	*h = old[:l-1]
 	return x
 }
+
+func Solution(nums []int, k int) int {
+	steps := 0
+	h := heap3066(nums)
+	heap.Init(&h)
+	var a, b int
+	for h.Len() > 0 {
+		top := h[0]
+		if top >= k {
+			break
+		}
+		a = heap.Pop(&h).(int)
+		b = heap.Pop(&h).(int)
+		heap.Push(&h, min(a, b)*2+max(a, b))
+		steps++
+	}
+	return steps
+}

leetcode/3001-3100/3066.Minimum-Operations-to-Exceed-Threshold-Value-II/Solution_test.go

@@ -10,30 +10,30 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs []int
+		k      int
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{2, 11, 10, 1, 3}, 10, 2},
+		{"TestCase2", []int{1, 1, 2, 4, 9}, 20, 4},
 	}
 
 	//	开始测试
 	for i, c := range cases {
 		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
-			got := Solution(c.inputs)
+			got := Solution(c.inputs, c.k)
 			if !reflect.DeepEqual(got, c.expect) {
-				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
-					c.expect, got, c.inputs)
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v %v",
+					c.expect, got, c.inputs, c.k)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }