Create remove-all-adjacent-duplicates-in-string-ii.cpp

Author: kamyu104

C++/remove-all-adjacent-duplicates-in-string-ii.cpp

@@ -0,0 +1,23 @@
+// Time:  O(n)
+// Space: O(n)
+
+class Solution {
+public:
+    string removeDuplicates(string s, int k) {
+        vector<pair<char, int>> stk = {{'^', 0}};
+        for (const auto& c : s) {
+            if (stk.back().first == c) {
+                if (++stk.back().second == k) {
+                    stk.pop_back();
+                }
+            } else {
+                stk.emplace_back(c, 1);
+            }
+        }
+        string result;
+        for (const auto& [c, v] : stk) {
+            result += string(v, c);
+        }
+        return result;
+    }
+};