feat: 2025-10-28打卡

122.best-time-to-buy-and-sell-stock-ii.java

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+/*
+ * @lc app=leetcode id=122 lang=java
+ *
+ * [122] Best Time to Buy and Sell Stock II
+ */
+
+// @lc code=start
+class Solution {
+    public int maxProfit(int[] prices) {
+        if(prices == null || prices.length <= 1) {
+            return 0;
+        }
+        int total = 0;
+        for(int i = 1; i<prices.length; i++) {
+            if(prices[i] - prices[i-1] > 0) {
+                total += prices[i] - prices[i-1];
+            }
+        }
+        return total;
+    }
+}
+// @lc code=end
+