Create Total Characters in String After Transformations I.java

Author: varunu28

Medium/Total Characters in String After Transformations I.java

@@ -0,0 +1,25 @@
+class Solution {
+
+    private static final int MOD = 1000_0000_07;
+
+    public int lengthAfterTransformations(String s, int t) {
+        int[] frequency = new int[26];
+        for (char c : s.toCharArray()) {
+            frequency[c - 'a']++;
+        }
+        for (int round = 0; round < t; round++) {
+            int[] next = new int[26];
+            next[0] = frequency[25]; // Transformation from 'z'
+            next[1] = (frequency[25] + frequency[0]) % MOD; // Transformation from either 'z' or 'a'
+            for (int i = 2; i < 26; i++) {
+                next[i] = frequency[i - 1]; // Transformation for next character
+            }
+            frequency = next;
+        }
+        int result = 0;
+        for (int i = 0; i < 26; i++) {
+            result = (result + frequency[i]) % MOD;
+        }
+        return result;
+    }
+}