From 51c8391d086ada5d10201e27c73e2198095abf69 Mon Sep 17 00:00:00 2001
From: QuinnDK <39618652+QuinnDK@users.noreply.github.com>
Date: Mon, 24 May 2021 10:19:53 +0800
Subject: [PATCH 1/2] =?UTF-8?q?Update=200077.=E7=BB=84=E5=90=88.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0077.组合.md | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/problems/0077.组合.md b/problems/0077.组合.md
index f31766e0..b0c4941d 100644
--- a/problems/0077.组合.md
+++ b/problems/0077.组合.md
@@ -373,7 +373,32 @@ Python：
 
 
 Go：
-
+```Go
+var res [][]int 
+func combine(n int, k int) [][]int {
+   res=[][]int{}
+   if n <= 0 || k <= 0 || k > n {
+		return res
+	}
+    backtrack(n, k, 1, []int{})
+	return res
+}
+func backtrack(n,k,start int,track []int){
+    if len(track)==k{
+        temp:=make([]int,k)
+        copy(temp,track)
+        res=append(res,temp)
+    }
+    if len(track)+n-start+1 < k {
+			return
+		}
+    for i:=start;i<=n;i++{ 
+        track=append(track,i)
+        backtrack(n,k,i+1,track)
+        track=track[:len(track)-1]
+    }
+}
+```
 
 
 

From 74118bd7c0361098cfabba2d99c8326ad235c9b1 Mon Sep 17 00:00:00 2001
From: QuinnDK <39618652+QuinnDK@users.noreply.github.com>
Date: Mon, 24 May 2021 10:21:49 +0800
Subject: [PATCH 2/2] =?UTF-8?q?Update=200077.=E7=BB=84=E5=90=88=E4=BC=98?=
 =?UTF-8?q?=E5=8C=96.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0077.组合优化.md | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/problems/0077.组合优化.md b/problems/0077.组合优化.md
index a8a17858..9994e9eb 100644
--- a/problems/0077.组合优化.md
+++ b/problems/0077.组合优化.md
@@ -179,6 +179,32 @@ Python：
 
 
 Go：
+```Go
+var res [][]int 
+func combine(n int, k int) [][]int {
+   res=[][]int{}
+   if n <= 0 || k <= 0 || k > n {
+		return res
+	}
+    backtrack(n, k, 1, []int{})
+	return res
+}
+func backtrack(n,k,start int,track []int){
+    if len(track)==k{
+        temp:=make([]int,k)
+        copy(temp,track)
+        res=append(res,temp)
+    }
+    if len(track)+n-start+1 < k {
+			return
+		}
+    for i:=start;i<=n;i++{ 
+        track=append(track,i)
+        backtrack(n,k,i+1,track)
+        track=track[:len(track)-1]
+    }
+}
+```