chore(store): move everything to store.

1 files changed, 34 insertions, 0 deletions

diff --git a/store/works/solutions/leetcode/cpp/123.cpp b/store/works/solutions/leetcode/cpp/123.cpp
new file mode 100644
index 0000000..ecf35c4
--- /dev/null
+++ b/store/works/solutions/leetcode/cpp/123.cpp
@@ -0,0 +1,34 @@
+#include <vector>

+#include <iostream>

+using std::vector;

+

+#include <algorithm>

+

+class Solution

+{

+public:

+    // 0 -> after buy for the first time

+    // 1 -> after sell for the first time

+    // 2 -> after buy for the second time

+    // 3 -> after sell for the second time

+

+    int maxProfit(vector<int> &prices)

+    {

+        int day_count = prices.size();

+

+        int state_0 = -prices[0];

+        int state_1 = 0;

+        int state_2 = -prices[0];

+        int state_3 = 0;

+

+        for (int day = 1; day < day_count; day++)

+        {

+            state_0 = std::max(state_0, -prices[day]);

+            state_1 = std::max(state_1, state_0 + prices[day]);

+            state_2 = std::max(state_2, state_1 - prices[day]);

+            state_3 = std::max(state_3, state_2 + prices[day]);

+        }

+

+        return std::max({state_0, state_1, state_2, state_3});

+    }

+};