0122买卖股票最佳时机2添加Java动态规划实现

This commit is contained in:
zhenzi
2021-05-15 11:30:14 +08:00
parent b7836d951f
commit ec61f2430d

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@ -133,7 +133,34 @@ public:
Java
```java
// 动态规划
class Solution
public int maxProfit(int[] prices) {
int n = prices.length;
int[][] dp = new int[n][2];
dp[0][0] = 0;
dp[0][1] = -prices[0];
for (int i = 1; i < n; ++i) {
dp[i][0] = Math.max(dp[i - 1][0], dp[i - 1][1] + prices[i]);
dp[i][1] = Math.max(dp[i - 1][1], dp[i - 1][0] - prices[i]);
}
return dp[n - 1][0];
}
public int maxProfit(int[] prices) {
int n = prices.length;
int dp0 = 0, dp1 = -prices[0];
for (int i = 1; i < n; ++i) {
int newDp0 = Math.max(dp0, dp1 + prices[i]);
int newDp1 = Math.max(dp1, dp0 - prices[i]);
dp0 = newDp0;
dp1 = newDp1;
}
return dp0;
}
}
```
Python