fix smells

src/main/java/g2001_2100/s2047_number_of_valid_words_in_a_sentence/Solution.java

@@ -35,9 +35,6 @@ public int countValidWords(String sentence) {
  } else if (Character.isDigit(token.charAt(i))) {
  valid = false;
  break;
- } else if (Character.isDigit(token.charAt(i))) {
- valid = false;
- break;
  }
  }
  if (valid) {

src/main/java/g2001_2100/s2048_next_greater_numerically_balanced_number/Solution.java

@@ -24,7 +24,7 @@ private int solve(int i, int n, int d, int sz, boolean[] select, int[] arr) {
  return ans;
  }
 
- private int make(int cur, int n, int end, boolean[] select, int[] arr) { // Get all permutation.
+ private int make(int cur, int n, int end, boolean[] select, int[] arr) {
  if (end == 0) {
  return cur > n ? cur : Integer.MAX_VALUE;
  }

src/main/java/g2001_2100/s2049_count_nodes_with_the_highest_score/Solution.java

@@ -5,7 +5,8 @@
 
 public class Solution {
  static class Node {
- Node left, right;
+ Node left;
+ Node right;
  }
 
  private int size;