From 6bda3ef91cdd92b56f24c32053d8be5897e7c368 Mon Sep 17 00:00:00 2001
From: 0xff-dev <stevenshuang521@gmail.com>
Date: Sun, 9 Nov 2025 12:04:39 +0800
Subject: [PATCH] Add solution and test-cases for problem 2169

---
 .../README.md                                 | 38 ++++++++++++-------
 .../Solution.go                               | 16 +++++++-
 .../Solution_test.go                          | 21 +++++-----
 3 files changed, 48 insertions(+), 27 deletions(-)

diff --git a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/README.md b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/README.md
index 97a834432..b810169ea 100755
--- a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/README.md
+++ b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/README.md
@@ -1,28 +1,38 @@
 # [2169.Count Operations to Obtain Zero][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
 
+You are given two **non-negative** integers `num1` and `num2`.
+
+In one **operation**, if `num1 >= num2`, you must subtract `num2` from `num1`, otherwise subtract `num1` from `num2`.
+
+- For example, if `num1 = 5` and `num2 = 4`, subtract `num2` from `num1`, thus obtaining `num1 = 1` and `num2 = 4`. However, if `num1 = 4` and `num2 = 5`, after one operation, `num1 = 4` and `num2 = 1`.
+
+Return the **number of operations** required to make either `num1 = 0` or `num2 = 0`.
+
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: num1 = 2, num2 = 3
+Output: 3
+Explanation: 
+- Operation 1: num1 = 2, num2 = 3. Since num1 < num2, we subtract num1 from num2 and get num1 = 2, num2 = 3 - 2 = 1.
+- Operation 2: num1 = 2, num2 = 1. Since num1 > num2, we subtract num2 from num1.
+- Operation 3: num1 = 1, num2 = 1. Since num1 == num2, we subtract num2 from num1.
+Now num1 = 0 and num2 = 1. Since num1 == 0, we do not need to perform any further operations.
+So the total number of operations required is 3.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Count Operations to Obtain Zero
-```go
 ```
-
+Input: num1 = 10, num2 = 10
+Output: 1
+Explanation: 
+- Operation 1: num1 = 10, num2 = 10. Since num1 == num2, we subtract num2 from num1 and get num1 = 10 - 10 = 0.
+Now num1 = 0 and num2 = 10. Since num1 == 0, we are done.
+So the total number of operations required is 1.
+```
 
 ## 结语
 
diff --git a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution.go b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution.go
index d115ccf5e..5374791ba 100644
--- a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution.go
+++ b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution.go
@@ -1,5 +1,17 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(num1 int, num2 int) int {
+	var ret, x int
+	for num1 > 0 && num2 > 0 {
+		if num1 > num2 {
+			x = num1 / num2
+			ret += x
+			num1 -= num2 * x
+			continue
+		}
+		x = num2 / num1
+		ret += x
+		num2 -= num1 * x
+	}
+	return ret
 }
diff --git a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution_test.go b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution_test.go
index 14ff50eb4..4fc36ec4d 100644
--- a/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution_test.go
+++ b/leetcode/2101-2200/2169.Count-Operations-to-Obtain-Zero/Solution_test.go
@@ -9,31 +9,30 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name       string
+		num1, num2 int
+		expect     int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 2, 3, 3},
+		{"TestCase2", 10, 10, 1},
 	}
 
 	//	开始测试
 	for i, c := range cases {
 		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
-			got := Solution(c.inputs)
+			got := Solution(c.num1, c.num2)
 			if !reflect.DeepEqual(got, c.expect) {
-				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
-					c.expect, got, c.inputs)
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v %v",
+					c.expect, got, c.num1, c.num2)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }