From 536b3594226cc989e624cae8b2603673f3199176 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8D=89=E8=8E=93=E5=B0=8F=E9=A5=BC=E8=82=9D?=
 <mbozhong@outlook.com>
Date: Mon, 11 Oct 2021 18:56:47 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=200042=E6=8E=A5=E9=9B=A8?=
 =?UTF-8?q?=E6=B0=B4=20Go=E8=AF=AD=E8=A8=80=20=E7=89=88=E6=9C=AC?=
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---
 problems/0042.接雨水.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/problems/0042.接雨水.md b/problems/0042.接雨水.md
index b75865d7..9b26bc6b 100644
--- a/problems/0042.接雨水.md
+++ b/problems/0042.接雨水.md
@@ -579,6 +579,31 @@ class Solution:
 
 Go:
 
+```go
+func trap(height []int) int {
+	var left, right, leftMax, rightMax, res int
+	right = len(height) - 1
+	for left < right {
+		if height[left] < height[right] {
+			if height[left] >= leftMax {
+				leftMax = height[left]  // 设置左边最高柱子
+			} else {
+				res += leftMax - height[left]  // //右边必定有柱子挡水，所以遇到所有值小于等于leftMax的，全部加入水池中
+			}
+			left++
+		} else {
+			if height[right] > rightMax { 
+				rightMax = height[right]  // //设置右边最高柱子
+			} else {
+				res += rightMax - height[right]  // //左边必定有柱子挡水，所以，遇到所有值小于等于rightMax的，全部加入水池
+			}
+			right--
+		}
+	}
+	return res
+}
+```
+
 JavaScript:
 ```javascript
 //双指针