接雨水题解half

TwoPointers/jieyushui/main.go

@@ -8,24 +8,26 @@ func main() {
 }
 
 func trap(height []int) int {
-	leftMaxlist := make([]int, len(height)+1)
-	rightMaxlist := make([]int, len(height)+1)
-	minMax := make([]int, len(height)+1)
-	for i := 0; i < len(height)-1; i++ {
-		leftMaxlist[i+1] = max(height[i], leftMaxlist[i])
+	leftP := 0
+	rightP := 1
+	result := 0
+	midres := 0
+	for {
+		if leftP > len(height)-1 || rightP > len(height)-1 {
+			break
 		}
-	for i := len(height) - 1; i >= 0; i-- {
-		rightMaxlist[i] = max(height[i], rightMaxlist[i+1])
+		if height[leftP] > height[rightP] {
+			midres += height[leftP] - height[rightP]
+			fmt.Println("result加上:", height[leftP]-height[rightP], "当前左指针：", leftP, "当前右指针:", rightP)
+			rightP++
+		} else if height[leftP] <= height[rightP] && midres != 0 {
+			result += midres
+			leftP = rightP
+			rightP = leftP + 1
+		} else {
+			leftP++
+			rightP = leftP + 1
 		}
-	fmt.Println(leftMaxlist)
-	fmt.Println(rightMaxlist)
-	for i := 0; i < len(minMax)-1; i++ {
-		minMax[i] = min(leftMaxlist[i], rightMaxlist[i])
 	}
-
-	for i := len(minMax) - 1; i >= 0; i-- {
-
-	}
-
-	return 0
+	return result
 }