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feat: add solutions to lc problem: No.2047
No.2047.Number of Valid Words in a Sentence
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‎solution/2000-2099/2047.Number of Valid Words in a Sentence/README.md

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Original file line numberDiff line numberDiff line change
@@ -74,15 +74,59 @@
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```python
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class Solution:
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def countValidWords(self, sentence: str) -> int:
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def check(token):
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hyphen = False
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for i, c in enumerate(token):
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if c.isdigit() or (c in '!.,' and i < len(token) - 1):
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return False
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if c == '-':
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if hyphen or i == 0 or i == len(token) - 1 or not token[i - 1].islower() or not token[i + 1].islower():
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return False
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hyphen = True
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return True
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return sum(check(token) for token in sentence.split())
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```
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### **Java**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```java
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class Solution {
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public int countValidWords(String sentence) {
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int ans = 0;
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for (String token : sentence.split(" ")) {
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if (check(token)) {
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++ans;
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}
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}
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return ans;
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}
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private boolean check(String token) {
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int n = token.length();
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if (n == 0) {
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return false;
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}
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boolean hyphen = false;
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for (int i = 0; i < n; ++i) {
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char c = token.charAt(i);
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if (Character.isDigit(c) || (i < n - 1 && (c == '!' || c == '.' || c == ','))) {
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return false;
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}
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if (c == '-') {
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if (hyphen || i == 0 || i == n - 1 || !Character.isLetter(token.charAt(i - 1)) || !Character.isLetter(token.charAt(i + 1))) {
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return false;
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}
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hyphen = true;
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}
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}
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return true;
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}
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}
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```
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### **TypeScript**

‎solution/2000-2099/2047.Number of Valid Words in a Sentence/README_EN.md

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@@ -70,13 +70,57 @@
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### **Python3**
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```python
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class Solution:
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def countValidWords(self, sentence: str) -> int:
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def check(token):
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hyphen = False
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for i, c in enumerate(token):
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if c.isdigit() or (c in '!.,' and i < len(token) - 1):
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return False
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if c == '-':
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if hyphen or i == 0 or i == len(token) - 1 or not token[i - 1].islower() or not token[i + 1].islower():
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return False
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hyphen = True
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return True
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return sum(check(token) for token in sentence.split())
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```
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### **Java**
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```java
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class Solution {
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public int countValidWords(String sentence) {
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int ans = 0;
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for (String token : sentence.split(" ")) {
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if (check(token)) {
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++ans;
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}
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}
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return ans;
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}
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private boolean check(String token) {
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int n = token.length();
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if (n == 0) {
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return false;
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}
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boolean hyphen = false;
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for (int i = 0; i < n; ++i) {
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char c = token.charAt(i);
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if (Character.isDigit(c) || (i < n - 1 && (c == '!' || c == '.' || c == ','))) {
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return false;
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}
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if (c == '-') {
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if (hyphen || i == 0 || i == n - 1 || !Character.isLetter(token.charAt(i - 1)) || !Character.isLetter(token.charAt(i + 1))) {
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return false;
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}
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hyphen = true;
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}
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}
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return true;
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}
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}
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```
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### **TypeScript**

‎solution/2000-2099/2047.Number of Valid Words in a Sentence/Solution.java

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@@ -0,0 +1,32 @@
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class Solution {
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public int countValidWords(String sentence) {
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int ans = 0;
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for (String token : sentence.split(" ")) {
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if (check(token)) {
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++ans;
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}
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}
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return ans;
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}
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private boolean check(String token) {
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int n = token.length();
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if (n == 0) {
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return false;
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}
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boolean hyphen = false;
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for (int i = 0; i < n; ++i) {
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char c = token.charAt(i);
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if (Character.isDigit(c) || (i < n - 1 && (c == '!' || c == '.' || c == ','))) {
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return false;
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}
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if (c == '-') {
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if (hyphen || i == 0 || i == n - 1 || !Character.isLetter(token.charAt(i - 1)) || !Character.isLetter(token.charAt(i + 1))) {
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return false;
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}
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hyphen = true;
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}
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}
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return true;
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}
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}

‎solution/2000-2099/2047.Number of Valid Words in a Sentence/Solution.py

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@@ -0,0 +1,14 @@
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class Solution:
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def countValidWords(self, sentence: str) -> int:
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def check(token):
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hyphen = False
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for i, c in enumerate(token):
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if c.isdigit() or (c in '!.,' and i < len(token) - 1):
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return False
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if c == '-':
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if hyphen or i == 0 or i == len(token) - 1 or not token[i - 1].islower() or not token[i + 1].islower():
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return False
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hyphen = True
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return True
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return sum(check(token) for token in sentence.split())

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