feat: add solutions to lc problem: No.0520

No.0520.Detect Capital

Author: yanglbme

solution/0500-0599/0520.Detect Capital/README.md

@@ -34,7 +34,6 @@
 
 <p><strong>注意:</strong> 输入是由大写和小写拉丁字母组成的非空单词。</p>
 
-
 ## 解法
 
 <!-- 这里可写通用的实现逻辑 -->
@@ -46,15 +45,59 @@
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
-
+class Solution:
+    def detectCapitalUse(self, word: str) -> bool:
+        cnt = 0
+        for c in word:
+            if c.isupper():
+                cnt += 1
+        return cnt == 0 or cnt == len(word) or (cnt == 1 and word[0].isupper())
 ```
 
 ### **Java**
 
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```java
+class Solution {
+    public boolean detectCapitalUse(String word) {
+        int cnt = 0;
+        for (char c : word.toCharArray()) {
+            if (Character.isUpperCase(c)) {
+                ++cnt;
+            }
+        }
+        return cnt == 0 || cnt == word.length() || (cnt == 1 && Character.isUpperCase(word.charAt(0)));
+    }
+}
+```
+
+### **C++**
+
+```cpp
+class Solution {
+public:
+    bool detectCapitalUse(string word) {
+        int cnt = 0;
+        for (char c : word)
+            if (isupper(c)) ++cnt;
+        return cnt == 0 || cnt == word.size() || (cnt == 1 && isupper(word[0]));
+    }
+};
+```
 
+### **Go**
+
+```go
+func detectCapitalUse(word string) bool {
+	cnt := 0
+	for _, c := range word {
+		if unicode.IsUpper(c) {
+			cnt++
+		}
+	}
+	return cnt == 0 || cnt == len(word) || (cnt == 1 && unicode.IsUpper(rune(word[0])))
+}
 ```
 
 ### **...**

solution/0500-0599/0520.Detect Capital/README_EN.md

@@ -6,12 +6,8 @@
 
 <p>Given a word, you need to judge whether the usage of capitals in it is right or not.</p>
 
-
-
 <p>We define the usage of capitals in a word to be right when one of the following cases holds:</p>
 
-
-
 <ol>
 	<li>All letters in this word are capitals, like &quot;USA&quot;.</li>
 	<li>All letters in this word are not capitals, like &quot;leetcode&quot;.</li>
@@ -20,16 +16,10 @@
 
 Otherwise, we define that this word doesn&#39;t use capitals in a right way.
 
-
-
 <p>&nbsp;</p>
 
-
-
 <p><b>Example 1:</b></p>
 
-
-
 <pre>
 
 <b>Input:</b> &quot;USA&quot;
@@ -38,16 +28,10 @@ Otherwise, we define that this word doesn&#39;t use capitals in a right way.
 
 </pre>
 
-
-
 <p>&nbsp;</p>
 
-
-
 <p><b>Example 2:</b></p>
 
-
-
 <pre>
 
 <b>Input:</b> &quot;FlaG&quot;
@@ -56,30 +40,68 @@ Otherwise, we define that this word doesn&#39;t use capitals in a right way.
 
 </pre>
 
-
-
 <p>&nbsp;</p>
 
-
-
 <p><b>Note:</b> The input will be a non-empty word consisting of uppercase and lowercase latin letters.</p>
 
-
-
 ## Solutions
 
 <!-- tabs:start -->
 
 ### **Python3**
 
 ```python
-
+class Solution:
+    def detectCapitalUse(self, word: str) -> bool:
+        cnt = 0
+        for c in word:
+            if c.isupper():
+                cnt += 1
+        return cnt == 0 or cnt == len(word) or (cnt == 1 and word[0].isupper())
 ```
 
 ### **Java**
 
 ```java
+class Solution {
+    public boolean detectCapitalUse(String word) {
+        int cnt = 0;
+        for (char c : word.toCharArray()) {
+            if (Character.isUpperCase(c)) {
+                ++cnt;
+            }
+        }
+        return cnt == 0 || cnt == word.length() || (cnt == 1 && Character.isUpperCase(word.charAt(0)));
+    }
+}
+```
+
+### **C++**
+
+```cpp
+class Solution {
+public:
+    bool detectCapitalUse(string word) {
+        int cnt = 0;
+        for (char c : word)
+            if (isupper(c)) ++cnt;
+        return cnt == 0 || cnt == word.size() || (cnt == 1 && isupper(word[0]));
+    }
+};
+```
 
+### **Go**
+
+```go
+func detectCapitalUse(word string) bool {
+	cnt := 0
+	for _, c := range word {
+		if unicode.IsUpper(c) {
+			cnt++
+		}
+	}
+	return cnt == 0 || cnt == len(word) || (cnt == 1 && unicode.IsUpper(rune(word[0])))
+}
 ```
 
 ### **...**

solution/0500-0599/0520.Detect Capital/Solution.cpp

@@ -0,0 +1,9 @@
+class Solution {
+public:
+    bool detectCapitalUse(string word) {
+        int cnt = 0;
+        for (char c : word)
+            if (isupper(c)) ++cnt;
+        return cnt == 0 || cnt == word.size() || (cnt == 1 && isupper(word[0]));
+    }
+};

solution/0500-0599/0520.Detect Capital/Solution.go

@@ -0,0 +1,9 @@
+func detectCapitalUse(word string) bool {
+	cnt := 0
+	for _, c := range word {
+		if unicode.IsUpper(c) {
+			cnt++
+		}
+	}
+	return cnt == 0 || cnt == len(word) || (cnt == 1 && unicode.IsUpper(rune(word[0])))
+}

solution/0500-0599/0520.Detect Capital/Solution.java

@@ -1,24 +1,11 @@
 class Solution {
     public boolean detectCapitalUse(String word) {
-        char[] cs = word.toCharArray();
-        int upper = 0;
-        int lower = 0;
-        for (int i = 0; i < cs.length; i++) {
-            if (cs[i] >= 'a') {
-                lower++;
-            } else {
-                upper++;
+        int cnt = 0;
+        for (char c : word.toCharArray()) {
+            if (Character.isUpperCase(c)) {
+                ++cnt;
             }
         }
-        if (upper == cs.length) {
-            return true;
-        }
-        if (lower == cs.length) {
-            return true;
-        }
-        if (upper == 1 && cs[0] < 'a') {
-            return true;
-        }
-        return false;
+        return cnt == 0 || cnt == word.length() || (cnt == 1 && Character.isUpperCase(word.charAt(0)));
     }
-}
+}

solution/0500-0599/0520.Detect Capital/Solution.py

@@ -0,0 +1,7 @@
+class Solution:
+    def detectCapitalUse(self, word: str) -> bool:
+        cnt = 0
+        for c in word:
+            if c.isupper():
+                cnt += 1
+        return cnt == 0 or cnt == len(word) or (cnt == 1 and word[0].isupper())