removing subfolders from the filesystem

Author: Arjiit

Strings/removeSubFolders.java

@@ -0,0 +1,15 @@
+class Solution {
+    public List<String> removeSubfolders(String[] folder) {
+        List<String> res = new ArrayList<>();
+        Arrays.sort(folder);
+        String prev = folder[0] + "/";
+        res.add(folder[0]);
+        for (int i=1; i <folder.length; i++) {
+            if (!folder[i].startsWith(prev)) {
+                res.add(folder[i]);
+                prev = folder[i] + "/";
+            }
+        }
+        return res;
+    }
+}