Add solution and test-cases for problem 3355

Author: 0xff-dev

leetcode/3301-3400/3355.Zero-Array-Transformation-I/README.md

@@ -1,28 +1,47 @@
 # [3355.Zero Array Transformation I][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` of length n and a 2D array `queries`, where `queries[i] = [li, ri]`.
+
+For each `queries[i]`:
+
+- Select a subset of indices within the range `[li, ri]` in nums.
+- Decrement the values at the selected indices by 1.
+
+A **Zero Array** is an array where all elements are equal to 0.
+
+Return `true` if it is possible to transform `nums` into a **Zero Array** after processing all the queries sequentially, otherwise return `false`.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: nums = [1,0,1], queries = [[0,2]]
 
-## 题意
-> ...
+Output: true
 
-## 题解
+Explanation:
 
-### 思路1
-> ...
-Zero Array Transformation I
-```go
+For i = 0:
+Select the subset of indices as [0, 2] and decrement the values at these indices by 1.
+The array will become [0, 0, 0], which is a Zero Array.
 ```
 
+**Example 2:**
+
+```
+Input: nums = [4,3,2,1], queries = [[1,3],[0,2]]
+
+Output: false
+
+Explanation:
+
+For i = 0:
+Select the subset of indices as [1, 2, 3] and decrement the values at these indices by 1.
+The array will become [4, 2, 1, 0].
+For i = 1:
+Select the subset of indices as [0, 1, 2] and decrement the values at these indices by 1.
+The array will become [3, 1, 0, 0], which is not a Zero Array.
+```
 
 ## 结语
 

leetcode/3301-3400/3355.Zero-Array-Transformation-I/Solution.go

@@ -1,5 +1,23 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int, queries [][]int) bool {
+	deltaArray := make([]int, len(nums)+1)
+	for _, query := range queries {
+		left := query[0]
+		right := query[1]
+		deltaArray[left] += 1
+		deltaArray[right+1] -= 1
+	}
+	operationCounts := make([]int, len(deltaArray))
+	currentOperations := 0
+	for i, delta := range deltaArray {
+		currentOperations += delta
+		operationCounts[i] = currentOperations
+	}
+	for i := 0; i < len(nums); i++ {
+		if operationCounts[i] < nums[i] {
+			return false
+		}
+	}
+	return true
 }

leetcode/3301-3400/3355.Zero-Array-Transformation-I/Solution_test.go

@@ -9,31 +9,31 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name    string
+		inputs  []int
+		queries [][]int
+		expect  bool
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{1, 0, 1}, [][]int{{0, 2}}, true},
+		{"TestCase2", []int{4, 3, 2, 1}, [][]int{{1, 3}, {0, 2}}, false},
 	}
 
 	//	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.queries)
 			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.queries)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }