Create maximum-coin-collection.cpp

Author: kamyu104

C++/maximum-coin-collection.cpp

@@ -0,0 +1,18 @@
+// Time:  O(n)
+// Space: O(1)
+
+// dp
+class Solution {
+public:
+    long long maxCoins(vector<int>& lane1, vector<int>& lane2) {
+        int64_t NEG_INF = numeric_limits<int64_t>::min();
+        int64_t result = NEG_INF, dp1 = NEG_INF, dp12 = NEG_INF, dp121 = NEG_INF;
+        for (int i = 0; i < size(lane1); ++i) {
+            dp1 = max(dp1, static_cast<int64_t>(0)) + lane1[i];
+            dp12 = max(max(dp12, static_cast<int64_t>(0)) + lane2[i], dp1);
+            dp121 = max(max(dp121, static_cast<int64_t>(0)) + lane1[i], dp12);
+            result = max({result, dp1, dp121});
+        }
+        return result;
+    }
+};