Marked known sonar warnings.

Author: javadev

src/main/java/s0015_three_sum/Solution.java

@@ -4,6 +4,7 @@
 import java.util.Arrays;
 import java.util.List;
 
+@SuppressWarnings("java:S127")
 public class Solution {
     public List<List<Integer>> threeSum(int[] nums) {
         Arrays.sort(nums);

src/main/java/s0018_four_sum/Solution.java

@@ -4,6 +4,7 @@
 import java.util.Arrays;
 import java.util.List;
 
+@SuppressWarnings("java:S135")
 public class Solution {
     public List<List<Integer>> fourSum(int[] nums, int target) {
         List<List<Integer>> list = new ArrayList<>();

src/main/java/s0020_valid_parentheses/Solution.java

@@ -2,6 +2,7 @@
 
 import java.util.Stack;
 
+@SuppressWarnings("java:S1149")
 public class Solution {
     public boolean isValid(String s) {
         Stack<Character> stack = new Stack<>();