Merge pull request #1191 from 0xff-dev/2294

Add solution and test-cases for problem 2294

Author: 6boris

leetcode/2201-2300/2294.Partition-Array-Such-That-Maximum-Difference-Is-K/README.md

@@ -1,28 +1,48 @@
 # [2294.Partition Array Such That Maximum Difference Is K][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 an integer array `nums` and an integer `k`. You may partition `nums` into one or more **subsequences** such that each element in `nums` appears in **exactly** one of the subsequences.
+
+Return the **minimum** number of subsequences needed such that the difference between the maximum and minimum values in each subsequence is **at most** `k`.
+
+A **subsequence** is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: nums = [3,6,1,2,5], k = 2
+Output: 2
+Explanation:
+We can partition nums into the two subsequences [3,1,2] and [6,5].
+The difference between the maximum and minimum value in the first subsequence is 3 - 1 = 2.
+The difference between the maximum and minimum value in the second subsequence is 6 - 5 = 1.
+Since two subsequences were created, we return 2. It can be shown that 2 is the minimum number of subsequences needed.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Partition Array Such That Maximum Difference Is K
-```go
 ```
+Input: nums = [1,2,3], k = 1
+Output: 2
+Explanation:
+We can partition nums into the two subsequences [1,2] and [3].
+The difference between the maximum and minimum value in the first subsequence is 2 - 1 = 1.
+The difference between the maximum and minimum value in the second subsequence is 3 - 3 = 0.
+Since two subsequences were created, we return 2. Note that another optimal solution is to partition nums into the two subsequences [1] and [2,3].
+```
+
+**Example 3:**
 
+```
+Input: nums = [2,2,4,5], k = 0
+Output: 3
+Explanation:
+We can partition nums into the three subsequences [2,2], [4], and [5].
+The difference between the maximum and minimum value in the first subsequences is 2 - 2 = 0.
+The difference between the maximum and minimum value in the second subsequences is 4 - 4 = 0.
+The difference between the maximum and minimum value in the third subsequences is 5 - 5 = 0.
+Since three subsequences were created, we return 3. It can be shown that 3 is the minimum number of subsequences needed.
+```
 
 ## 结语
 

leetcode/2201-2300/2294.Partition-Array-Such-That-Maximum-Difference-Is-K/Solution.go

@@ -1,5 +1,18 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+import "sort"
+
+func Solution(nums []int, k int) int {
+	sort.Ints(nums)
+	ans := 0
+	start := 0
+	l := len(nums)
+	for start < l {
+		i := sort.Search(l, func(i int) bool {
+			return nums[i] > nums[start]+k
+		})
+		ans++
+		start = i
+	}
+	return ans
 }

leetcode/2201-2300/2294.Partition-Array-Such-That-Maximum-Difference-Is-K/Solution_test.go

@@ -10,30 +10,31 @@ 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{3, 6, 1, 2, 5}, 2, 2},
+		{"TestCase2", []int{1, 2, 3}, 1, 2},
+		{"TestCase3", []int{2, 2, 4, 5}, 0, 3},
 	}
 
 	//	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() {
 }