Merge pull request #2997 from Anukriti167/patch-14

Create 1456-maximum-number-of-vowels-in-a-substring-of-given-length.java

Author: MHamiid

java/1456-maximum-number-of-vowels-in-a-substring-of-given-length.java

@@ -0,0 +1,18 @@
+class Solution {
+    public int maxVowels(String s, int k) {
+        Set<Character> set = new HashSet<>();
+        Collections.addAll(set, 'a', 'e', 'i', 'o', 'u');
+
+        int l=0, cnt=0, res=0;
+
+        for(int r=0; r<s.length(); r++){
+            cnt += set.contains(s.charAt(r))?1:0;
+            if(r-l+1 > k){
+                cnt -= set.contains(s.charAt(l))?1:0;
+                l++;
+            }
+            res = Math.max(res, cnt);
+        }
+        return res;
+    }
+}