Merge pull request #1154 from 0xff-dev/3191

Add solution and test-cases for problem 3191

Author: 6boris

leetcode/3101-3200/3191.Minimum-Operations-to-Make-Binary-Array-Elements-Equal-to-One-I/README.md

@@ -1,28 +1,41 @@
 # [3191.Minimum Operations to Make Binary Array Elements Equal to One 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 a `binary  array` `nums`.
+
+You can do the following operation on the array **any** number of times (possibly zero):
+
+- Choose **any 3 consecutive** elements from the array and **flip all** of them.
+
+**Flipping** an element means changing its value from 0 to 1, and from 1 to 0.
+
+Return the **minimum** number of operations required to make all elements in `nums` equal to 1. If it is impossible, return -1.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: nums = [0,1,1,1,0,0]
 
-## 题意
-> ...
+Output: 3
 
-## 题解
+Explanation:
+We can do the following operations:
 
-### 思路1
-> ...
-Minimum Operations to Make Binary Array Elements Equal to One I
-```go
+Choose the elements at indices 0, 1 and 2. The resulting array is nums = [1,0,0,1,0,0].
+Choose the elements at indices 1, 2 and 3. The resulting array is nums = [1,1,1,0,0,0].
+Choose the elements at indices 3, 4 and 5. The resulting array is nums = [1,1,1,1,1,1].
 ```
 
+**Example 2:**
+
+```
+Input: nums = [0,1,1,1]
+
+Output: -1
+
+Explanation:
+It is impossible to make all elements equal to 1.
+```
 
 ## 结语
 

leetcode/3101-3200/3191.Minimum-Operations-to-Make-Binary-Array-Elements-Equal-to-One-I/Solution.go

@@ -1,5 +1,20 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int) int {
+	ans := 0
+	index := 0
+	l := len(nums)
+	for ; index < l; index++ {
+		if nums[index] == 1 {
+			continue
+		}
+		if index >= l-2 {
+			return -1
+		}
+		nums[index] = 1 - nums[index]
+		nums[index+1] = 1 - nums[index+1]
+		nums[index+2] = 1 - nums[index+2]
+		ans++
+	}
+	return ans
 }

leetcode/3101-3200/3191.Minimum-Operations-to-Make-Binary-Array-Elements-Equal-to-One-I/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 int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{0, 1, 1, 1, 0, 0}, 3},
+		{"TestCase2", []int{0, 1, 1, 1}, -1},
 	}
 
 	//	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() {
 }