Merge pull request #1378 from 0xff-dev/3190

Add solution and test-cases for problem 3190

Author: 6boris

leetcode/3101-3200/3190.Find-Minimum-Operations-to-Make-All-Elements-Divisible-by-Three/README.md

@@ -1,28 +1,33 @@
 # [3190.Find Minimum Operations to Make All Elements Divisible by Three][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`. In one operation, you can add or subtract 1 from **any** element of `nums`.
+
+Return the **minimum** number of operations to make all elements of `nums` divisible by 3.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: nums = [1,2,3,4]
+
+Output: 3
 
-## 题意
-> ...
+Explanation:
 
-## 题解
+All array elements can be made divisible by 3 using 3 operations:
 
-### 思路1
-> ...
-Find Minimum Operations to Make All Elements Divisible by Three
-```go
+Subtract 1 from 1.
+Add 1 to 2.
+Subtract 1 from 4.
 ```
 
+**Example 2:**
+
+```
+Input: nums = [3,6,9]
+
+Output: 0
+```
 
 ## 结语
 

leetcode/3101-3200/3190.Find-Minimum-Operations-to-Make-All-Elements-Divisible-by-Three/Solution.go

@@ -1,5 +1,19 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+import "sort"
+
+func Solution(nums []int) int {
+
+	byThree := []int{0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51}
+	l := len(byThree)
+	var ret int
+
+	for _, n := range nums {
+		index := sort.Search(l, func(i int) bool {
+			return byThree[i] >= n
+		})
+		ret += min(byThree[index]-n, n-byThree[index-1])
+	}
+
+	return ret
 }

leetcode/3101-3200/3190.Find-Minimum-Operations-to-Make-All-Elements-Divisible-by-Three/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{1, 2, 3, 4}, 3},
+		{"TestCase2", []int{3, 6, 9}, 0},
 	}
 
 	//	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() {
 }