Update 0015.三数之和.md

problems/0015.三数之和.md

@@ -221,6 +221,40 @@ Python：
 
 
 Go：
+```Go
+func threeSum(nums []int)[][]int{
+	sort.Ints(nums)
+	res:=[][]int{}
+	
+	for i:=0;i<len(nums)-2;i++{
+		n1:=nums[i]
+		if n1>0{
+			break
+		}
+		if i>0&&n1==nums[i-1]{
+			continue
+		}
+		l,r:=i+1,len(nums)-1
+		for l<r{
+			n2,n3:=nums[l],nums[r]
+			if n1+n2+n3==0{
+				res=append(res,[]int{n1,n2,n3})
+				for l<r&&nums[l]==n2{
+					l++
+				}
+				for l<r&&nums[r]==n3{
+					r--
+				}
+			}else if n1+n2+n3<0{
+				l++
+			}else {
+				r--
+			}
+		}
+	}
+	return res
+}
+```