Add solution and test-cases for problem 3370

Author: 0xff-dev

leetcode/3301-3400/3370.Smallest-Number-With-All-Set-Bits/README.md

@@ -1,28 +1,45 @@
 # [3370.Smallest Number With All Set Bits][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 a positive number `n`.
+
+Return the **smallest** number `x` **greater than** or **equal to** `n`, such that the binary representation of `x` contains only set bits
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: n = 5
+
+Output: 7
+
+Explanation:
+
+The binary representation of 7 is "111".
+```
+
+**Example 2:**
+
 ```
+Input: n = 10
+
+Output: 15
 
-## 题意
-> ...
+Explanation:
+
+The binary representation of 15 is "1111".
+```
 
-## 题解
+**Example 3:**
 
-### 思路1
-> ...
-Smallest Number With All Set Bits
-```go
 ```
+Input: n = 3
 
+Output: 3
+
+Explanation:
+
+The binary representation of 3 is "11".
+```
 
 ## 结语
 

leetcode/3301-3400/3370.Smallest-Number-With-All-Set-Bits/Solution.go

@@ -1,5 +1,12 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(n int) int {
+	base := 2
+	for i := 0; i < 10; i++ {
+		if base-1 >= n {
+			return base - 1
+		}
+		base *= 2
+	}
+	return 0
 }

leetcode/3301-3400/3370.Smallest-Number-With-All-Set-Bits/Solution_test.go

@@ -10,12 +10,12 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs int
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 5, 7},
+		{"TestCase2", 10, 15},
+		{"TestCase3", 3, 3},
 	}
 
 	//	开始测试
@@ -30,10 +30,10 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }