[LEET-3285] add 3285

Author: fishercoder1534

Diff for: paginated_contents/algorithms/4th_thousand/README.md

@@ -1,5 +1,6 @@
 | #    | Title                                                                                                                                                               | Solutions                                                                                                                         | Video                                                                         | Difficulty | Tag                                                                  
 |------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|------------|----------------------------------------------------------------------
+| 3285 | [Find Indices of Stable Mountains](https://leetcode.com/problems/find-indices-of-stable-mountains/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3285.java) |                                                                               | Easy       |
 | 3264 | [Final Array State After K Multiplication Operations I](https://leetcode.com/problems/final-array-state-after-k-multiplication-operations-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3264.java) |                                                                               | Easy       |
 | 3263 | [Convert Doubly Linked List to Array I](https://leetcode.com/problems/convert-doubly-linked-list-to-array-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3263.java) |                                                                               | Easy       |
 | 3258 | [Count Substrings That Satisfy K-Constraint I](https://leetcode.com/problems/count-substrings-that-satisfy-k-constraint-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3258.java) |                                                                               | Easy       |

Diff for: src/main/java/com/fishercoder/solutions/fourththousand/_3285.java

@@ -0,0 +1,18 @@
+package com.fishercoder.solutions.fourththousand;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class _3285 {
+    public static class Solution1 {
+        public List<Integer> stableMountains(int[] height, int threshold) {
+            List<Integer> ans = new ArrayList<>();
+            for (int i = 1; i < height.length; i++) {
+                if (height[i - 1] > threshold) {
+                    ans.add(i);
+                }
+            }
+            return ans;
+        }
+    }
+}