Merge pull request #1273 from 0xff-dev/1805

Add solution and test-cases for problem 1805

Author: 6boris

leetcode/1801-1900/1805.Number-of-Different-Integers-in-a-String/README.md

@@ -1,28 +1,37 @@
 # [1805.Number of Different Integers in a String][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 `word` that consists of digits and lowercase English letters.
+
+You will replace every non-digit character with a space. For example, `"a123bc34d8ef34"` will become `" 123  34 8  34"`. Notice that you are left with some integers that are separated by at least one space: `"123"`, `"34"`, `"8"`, and `"34"`.
+
+Return the number of **different** integers after performing the replacement operations on `word`.
+
+Two integers are considered different if their decimal representations **without any leading zeros** are different.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: word = "a123bc34d8ef34"
+Output: 3
+Explanation: The three different integers are "123", "34", and "8". Notice that "34" is only counted once.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Number of Different Integers in a String
-```go
 ```
+Input: word = "leet1234code234"
+Output: 2
+```
+
+**Example 3:**
 
+```
+Input: word = "a1b01c001"
+Output: 1
+Explanation: The three integers "1", "01", and "001" all represent the same integer because
+the leading zeros are ignored when comparing their decimal values.
+```
 
 ## 结语
 

leetcode/1801-1900/1805.Number-of-Different-Integers-in-a-String/Solution.go

@@ -1,5 +1,39 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(word string) int {
+	count := make(map[string]struct{})
+	firstMeet := true
+	foundNumber := false
+	start := -1
+	for i, b := range word {
+		if b >= '0' && b <= '9' {
+			foundNumber = true
+			if firstMeet && b == '0' {
+				continue
+			}
+			if start == -1 {
+				start = i
+			}
+			firstMeet = false
+			continue
+		}
+		if foundNumber {
+			if start == -1 {
+				count["0"] = struct{}{}
+			} else {
+				count[word[start:i]] = struct{}{}
+			}
+		}
+		foundNumber = false
+		firstMeet = true
+		start = -1
+	}
+	if foundNumber {
+		if start == -1 {
+			count["0"] = struct{}{}
+		} else {
+			count[word[start:]] = struct{}{}
+		}
+	}
+	return len(count)
 }

leetcode/1801-1900/1805.Number-of-Different-Integers-in-a-String/Solution_test.go

@@ -10,12 +10,12 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs string
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", "a123bc34d8ef34", 3},
+		{"TestCase2", "leet1234code234", 2},
+		{"TestCase3", "a1b01c001", 1},
 	}
 
 	//	开始测试
@@ -30,10 +30,10 @@ 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() {
 }