2840. Check if Strings Can be Made Equal With Operations II

2840. Check if Strings Can be Made Equal With Operations II/Solution.cs

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+public class Solution
+{
+    public bool CheckStrings(string s1, string s2)
+    {
+        var d1 = new char['z' - 'a' + 1];
+        var d2 = new char['z' - 'a' + 1];
+        for (var i = 0; i < s1.Length; i += 2)
+        {
+            d1[s1[i]-'a']++;
+            d1[s2[i]-'a']--;
+            if (i + 1 < s1.Length)
+            {
+                d2[s1[i + 1]-'a']++;
+                d2[s2[i + 1]-'a']--;
+            }
+        }
+        foreach (var c in d1)
+            if (c != 0)
+                return false;
+        foreach (var c in d2)
+            if (c != 0)
+                return false;
+        return true;
+    }
+}