Merge pull request 6boris#726 from 0xff-dev/1897

Add solution and test-cases for problem 1897

Author: 6boris

leetcode/1801-1900/1897.Redistribute-Characters-to-Make-All-Strings-Equal/README.md

@@ -1,28 +1,29 @@
 # [1897.Redistribute Characters to Make All Strings Equal][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 array of strings `words` (0-indexed).
+
+In one operation, pick two **distinct** indices `i` and `j`, where `words[i]` is a non-empty string, and move **any** character from `words[i]` to any position in `words[j]`.
+
+Return `true` if you can make **every** string in `wrods` **equal** using **any** number of operations, and `false` otherwise.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: words = ["abc","aabc","bc"]
+Output: true
+Explanation: Move the first 'a' in words[1] to the front of words[2],
+to make words[1] = "abc" and words[2] = "abc".
+All the strings are now equal to "abc", so return true.
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Redistribute Characters to Make All Strings Equal
-```go
 ```
-
+Input: words = ["ab","a"]
+Output: false
+Explanation: It is impossible to make all the strings equal using the operation.
+```
 
 ## 结语
 

leetcode/1801-1900/1897.Redistribute-Characters-to-Make-All-Strings-Equal/Solution.go

@@ -1,5 +1,17 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(words []string) bool {
+	letters := [26]int{}
+	for _, word := range words {
+		for _, b := range word {
+			letters[b-'a']++
+		}
+	}
+	l := len(words)
+	for i := 0; i < 26; i++ {
+		if letters[i]%l != 0 {
+			return false
+		}
+	}
+	return true
 }

leetcode/1801-1900/1897.Redistribute-Characters-to-Make-All-Strings-Equal/Solution_test.go

@@ -10,12 +10,11 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
+		inputs []string
 		expect bool
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []string{"abc", "aabc", "bc"}, true},
+		{"TestCase2", []string{"ab", "a"}, false},
 	}
 
 	//	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() {
 }