From 01c2e3efc1a8f49fd7312e8bf52692505a5f7157 Mon Sep 17 00:00:00 2001
From: 0xff-dev <stevenshuang521@gmail.com>
Date: Wed, 19 Nov 2025 23:08:32 +0800
Subject: [PATCH] Add solution and test-cases for problem 2154

---
 .../README.md                                 | 36 +++++++++++--------
 .../Solution.go                               | 20 +++++++++--
 .../Solution_test.go                          | 22 ++++++------
 3 files changed, 51 insertions(+), 27 deletions(-)

diff --git a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/README.md b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/README.md
index e747d1563..d4b4fecb4 100755
--- a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/README.md
+++ b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/README.md
@@ -1,28 +1,36 @@
 # [2154.Keep Multiplying Found Values by Two][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 an array of integers `nums`. You are also given an integer `original` which is the first number that needs to be searched for in `nums`.
+
+You then do the following steps:
+
+1. If `original` is found in `nums`, **multiply** it by two (i.e., set `original = 2 * original`).
+2. Otherwise, **stop** the process.
+3. **Repeat** this process with the new number as long as you keep finding the number.
+
+Return the **final** value of `original`.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: nums = [5,3,6,1,12], original = 3
+Output: 24
+Explanation: 
+- 3 is found in nums. 3 is multiplied by 2 to obtain 6.
+- 6 is found in nums. 6 is multiplied by 2 to obtain 12.
+- 12 is found in nums. 12 is multiplied by 2 to obtain 24.
+- 24 is not found in nums. Thus, 24 is returned.
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Keep Multiplying Found Values by Two
-```go
 ```
-
+Input: nums = [2,7,9], original = 4
+Output: 4
+Explanation:
+- 4 is not found in nums. Thus, 4 is returned.
+```
 
 ## 结语
 
diff --git a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution.go b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution.go
index d115ccf5e..1eb853ef1 100644
--- a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution.go
+++ b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution.go
@@ -1,5 +1,21 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int, original int) int {
+	var (
+		ret int  = original
+		ok  bool = false
+		end int  = 0
+	)
+	m := make(map[int]struct{})
+	for _, n := range nums {
+		end = max(end, n)
+		m[n] = struct{}{}
+	}
+	for ; ret <= end; ret *= 2 {
+		_, ok = m[ret]
+		if !ok {
+			break
+		}
+	}
+	return ret
 }
diff --git a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution_test.go b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution_test.go
index 14ff50eb4..2906ec07c 100644
--- a/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution_test.go
+++ b/leetcode/2101-2200/2154.Keep-Multiplying-Found-Values-by-Two/Solution_test.go
@@ -9,31 +9,31 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name     string
+		inputs   []int
+		original int
+		expect   int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{5, 3, 6, 1, 12}, 3, 24},
+		{"TestCase2", []int{2, 7, 9}, 4, 4},
 	}
 
 	//	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.inputs, c.original)
 			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.inputs, c.original)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }