Create maximize-the-total-height-of-unique-towers.cpp

Author: kamyu104

C++/maximize-the-total-height-of-unique-towers.cpp

@@ -0,0 +1,20 @@
+// Time:  O(nlogn)
+// Space: O(1)
+
+// sort, greedy
+class Solution {
+public:
+    long long maximumTotalSum(vector<int>& maximumHeight) {
+        sort(begin(maximumHeight), end(maximumHeight), greater<int>());
+        int64_t result = 0;
+        int prev = maximumHeight.front() + 1;
+        for (const auto& x : maximumHeight) {
+            prev = min(x, prev - 1);
+            if (prev == 0) {
+                return -1;
+            }
+            result += prev;
+        }
+        return result;
+    }
+};