feat: add solutions to lc problem: No.0434

No.0434.Number of Segments in a String

Author: yanglbme

solution/0400-0499/0434.Number of Segments in a String/README.md

@@ -17,27 +17,95 @@
 <strong>解释: </strong>这里的单词是指连续的不是空格的字符，所以 &quot;Hello,&quot; 算作 1 个单词。
 </pre>
 
-
 ## 解法
 
 <!-- 这里可写通用的实现逻辑 -->
 
+split 切分字符串，或者直接遍历计数。
+
 <!-- tabs:start -->
 
 ### **Python3**
 
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+class Solution:
+    def countSegments(self, s: str) -> int:
+        return sum(1 for t in s.split(' ') if t)
+```
 
+```python
+class Solution:
+    def countSegments(self, s: str) -> int:
+        res, n = 0, len(s)
+        for i in range(n):
+            if s[i] != ' ' and (i == 0 or s[i - 1] == ' '):
+                res += 1
+        return res
 ```
 
 ### **Java**
 
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```java
+class Solution {
+    public int countSegments(String s) {
+        int res = 0;
+        for (String t : s.split(" ")) {
+            if (!"".equals(t)) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}
+```
+
+```java
+class Solution {
+    public int countSegments(String s) {
+        int res = 0;
+        for (int i = 0; i < s.length(); ++i) {
+            if (s.charAt(i) != ' ' && (i == 0 || s.charAt(i - 1) == ' ')) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}
+```
+
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int countSegments(string s) {
+        int res = 0;
+        for (int i = 0; i < s.size(); ++i)
+        {
+            if (s[i] != ' ' && (i == 0 || s[i - 1] == ' '))
+                ++res;
+        }
+        return res;
+    }
+};
+```
 
+### **Go**
+
+```go
+func countSegments(s string) int {
+	res := 0
+	for i, c := range s {
+		if c != ' ' && (i == 0 || s[i-1] == ' ') {
+			res++
+		}
+	}
+	return res
+}
 ```
 
 ### **...**

solution/0400-0499/0434.Number of Segments in a String/README_EN.md

@@ -47,21 +47,87 @@
 	<li>The only space character in <code>s</code> is <code>&#39; &#39;</code>.</li>
 </ul>
 
-
 ## Solutions
 
 <!-- tabs:start -->
 
 ### **Python3**
 
 ```python
+class Solution:
+    def countSegments(self, s: str) -> int:
+        return sum(1 for t in s.split(' ') if t)
+```
 
+```python
+class Solution:
+    def countSegments(self, s: str) -> int:
+        res, n = 0, len(s)
+        for i in range(n):
+            if s[i] != ' ' and (i == 0 or s[i - 1] == ' '):
+                res += 1
+        return res
 ```
 
 ### **Java**
 
 ```java
+class Solution {
+    public int countSegments(String s) {
+        int res = 0;
+        for (String t : s.split(" ")) {
+            if (!"".equals(t)) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}
+```
+
+```java
+class Solution {
+    public int countSegments(String s) {
+        int res = 0;
+        for (int i = 0; i < s.length(); ++i) {
+            if (s.charAt(i) != ' ' && (i == 0 || s.charAt(i - 1) == ' ')) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}
+```
+
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int countSegments(string s) {
+        int res = 0;
+        for (int i = 0; i < s.size(); ++i)
+        {
+            if (s[i] != ' ' && (i == 0 || s[i - 1] == ' '))
+                ++res;
+        }
+        return res;
+    }
+};
+```
 
+### **Go**
+
+```go
+func countSegments(s string) int {
+	res := 0
+	for i, c := range s {
+		if c != ' ' && (i == 0 || s[i-1] == ' ') {
+			res++
+		}
+	}
+	return res
+}
 ```
 
 ### **...**

solution/0400-0499/0434.Number of Segments in a String/Solution.cpp

@@ -1,13 +1,12 @@
 class Solution {
 public:
     int countSegments(string s) {
-        if (s.length() < 1)
-            return 0 ;
-        
-        int cnt = isspace(s[0])? 0: 1 ;
-        for (int i = 1; i < s.length(); ++i)
-            if (!isspace(s[i]) && isspace(s[i-1]))
-                ++cnt ;
-        return cnt ;
+        int res = 0;
+        for (int i = 0; i < s.size(); ++i)
+        {
+            if (s[i] != ' ' && (i == 0 || s[i - 1] == ' ')) 
+                ++res;
+        }
+        return res;
     }
 };

solution/0400-0499/0434.Number of Segments in a String/Solution.go

@@ -0,0 +1,9 @@
+func countSegments(s string) int {
+	res := 0
+	for i, c := range s {
+		if c != ' ' && (i == 0 || s[i-1] == ' ') {
+			res++
+		}
+	}
+	return res
+}

solution/0400-0499/0434.Number of Segments in a String/Solution.java

@@ -0,0 +1,11 @@
+class Solution {
+    public int countSegments(String s) {
+        int res = 0;
+        for (int i = 0; i < s.length(); ++i) {
+            if (s.charAt(i) != ' ' && (i == 0 || s.charAt(i - 1) == ' ')) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}

solution/0400-0499/0434.Number of Segments in a String/Solution.py

@@ -0,0 +1,7 @@
+class Solution:
+    def countSegments(self, s: str) -> int:
+        res, n = 0, len(s)
+        for i in range(n):
+            if s[i] != ' ' and (i == 0 or s[i - 1] == ' '):
+                res += 1
+        return res