Create minimum-number-of-operations-to-make-word-k-periodic.cpp

Author: kamyu104

C++/minimum-number-of-operations-to-make-word-k-periodic.cpp

@@ -0,0 +1,15 @@
+// Time:  O(n)
+// Space: O(n)
+
+// freq table
+class Solution {
+public:
+    int minimumOperationsToMakeKPeriodic(string word, int k) {
+        unordered_map<string, int> cnt;
+        int mx = 0;
+        for (int i = 0; i < size(word); i += k) {
+            mx = max(mx, ++cnt[word.substr(i, k)]);
+        }
+        return size(word) / k - mx;
+    }
+};