Merge pull request #1118 from 0xff-dev/3174

Add solution and test-cases for problem 3174

Author: 6boris

leetcode/3101-3200/3174.Clear-Digits/README.md

@@ -1,28 +1,39 @@
 # [3174.Clear Digits][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 string `s`.
+
+Your task is to remove **all** digits by doing this operation repeatedly:
+
+- Delete the first digit and the **closest non-digit** character to its left.
+
+Return the resulting string after removing all digits.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: s = "abc"
+
+Output: "abc"
 
-## 题意
-> ...
+Explanation:
 
-## 题解
+There is no digit in the string.
+```
+
+**Example 2:**
 
-### 思路1
-> ...
-Clear Digits
-```go
 ```
+Input: s = "cb34"
+
+Output: ""
 
+Explanation:
+
+First, we apply the operation on s[2], and s becomes "c4".
+
+Then we apply the operation on s[1], and s becomes "".
+```
 
 ## 结语
 

leetcode/3101-3200/3174.Clear-Digits/Solution.go

@@ -1,5 +1,15 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(s string) string {
+	bs := []byte(s)
+	index := -1
+	for i := range len(bs) {
+		if !(bs[i] >= '0' && bs[i] <= '9') {
+			index++
+			bs[index] = bs[i]
+			continue
+		}
+		index--
+	}
+	return string(bs[:index+1])
 }

leetcode/3101-3200/3174.Clear-Digits/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 string
+		expect string
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", "abc", "abc"},
+		{"TestCase2", "cb34", ""},
 	}
 
 	//	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() {
 }