Merge pull request #1305 from 0xff-dev/3495

Add solution and test-cases for problem 3495

Author: 6boris

leetcode/3401-3500/3495.Minimum-Operations-to-Make-Array-Elements-Zero/README.md

@@ -1,28 +1,57 @@
 # [3495.Minimum Operations to Make Array Elements Zero][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 2D array `queries`, where `queries[i]` is of the form `[l, r]`. Each `queries[i]` defines an array of integers `nums` consisting of elements ranging from `l` to `r`, both **inclusive**.
+
+In one operation, you can:
+
+- Select two integers `a` and `b` from the array.
+- Replace them with `floor(a / 4)` and `floor(b / 4)`.
+
+Your task is to determine the **minimum** number of operations required to reduce all elements of the array to zero for each query. Return the sum of the results for all queries.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: queries = [[1,2],[2,4]]
+
+Output: 3
+
+Explanation:
 
-## 题意
-> ...
+For queries[0]:
 
-## 题解
+The initial array is nums = [1, 2].
+In the first operation, select nums[0] and nums[1]. The array becomes [0, 0].
+The minimum number of operations required is 1.
+For queries[1]:
 
-### 思路1
-> ...
-Minimum Operations to Make Array Elements Zero
-```go
+The initial array is nums = [2, 3, 4].
+In the first operation, select nums[0] and nums[2]. The array becomes [0, 3, 1].
+In the second operation, select nums[1] and nums[2]. The array becomes [0, 0, 0].
+The minimum number of operations required is 2.
+The output is 1 + 2 = 3.
 ```
 
+**Example 2:**
+
+```
+Input: queries = [[2,6]]
+
+Output: 4
+
+Explanation:
+
+For queries[0]:
+
+The initial array is nums = [2, 3, 4, 5, 6].
+In the first operation, select nums[0] and nums[3]. The array becomes [0, 3, 4, 1, 6].
+In the second operation, select nums[2] and nums[4]. The array becomes [0, 3, 1, 1, 1].
+In the third operation, select nums[1] and nums[2]. The array becomes [0, 0, 0, 1, 1].
+In the fourth operation, select nums[3] and nums[4]. The array becomes [0, 0, 0, 0, 0].
+The minimum number of operations required is 4.
+The output is 4.
+```
 
 ## 结语
 

leetcode/3401-3500/3495.Minimum-Operations-to-Make-Array-Elements-Zero/Solution.go

@@ -1,5 +1,28 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func get(num int) int64 {
+	var cnt int64
+	i := 1
+	base := 1
+
+	for base <= num {
+		end := base*2 - 1
+		if end > num {
+			end = num
+		}
+		cnt += int64((i+1)/2) * int64(end-base+1)
+		i++
+		base *= 2
+	}
+	return cnt
+}
+
+func Solution(queries [][]int) int64 {
+	var res int64
+	for _, q := range queries {
+		count1 := get(q[1])
+		count2 := get(q[0] - 1)
+		res += (count1 - count2 + 1) / 2
+	}
+	return res
 }

leetcode/3401-3500/3495.Minimum-Operations-to-Make-Array-Elements-Zero/Solution_test.go

@@ -10,12 +10,11 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs [][]int
+		expect int64
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", [][]int{{1, 2}, {2, 4}}, 3},
+		{"TestCase2", [][]int{{2, 6}}, 4},
 	}
 
 	//	开始测试
@@ -30,10 +29,10 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }