min_price = float('inf')
max_profit = 0
for price in prices:
min_price = min(min_price, price)
max_profit = max(max_profit, price - min_price)
return max_profit
public int MaxProfit(int[] prices) {
int minPrice = Int32.MaxValue;
int maxProfit = 0;
foreach (int price in prices) {
minPrice = Math.Min(minPrice, price);
maxProfit = Math.Max(maxProfit, price - minPrice);
}
return maxProfit;
}
? ? ? ? 一开始我想到的是引入波峰波谷的概念,但是不适用,想复杂了。