refactor Best Time to Buy and Sell Stock

Author: za-bannai

go/best_time_to_buy_and_sell_stock.go

@@ -2,10 +2,10 @@
 package main
 
 func maxProfit(prices []int) int {
-	lowestPrice, highestProfit := prices[0], 0
-	for _, n := range prices {
-		lowestPrice = min(lowestPrice, n)
-		highestProfit = max(highestProfit, n-lowestPrice)
+	minPrice, maxProfit := prices[0], 0
+	for _, price := range prices {
+		minPrice = min(minPrice, price)
+		maxProfit = max(maxProfit, price-minPrice)
 	}
-	return highestProfit
+	return maxProfit
 }