Add solution and test-cases for problem 1447

Author: 0xff-dev

leetcode/1401-1500/1447.Simplified-Fractions/README.md

@@ -0,0 +1,34 @@
+# [1447.Simplified Fractions][title]
+
+## Description
+Given an integer `n`, return a list of all **simplified** fractions between `0` and `1` (exclusive) such that the denominator is less-than-or-equal-to `n`. You can return the answer in **any order**.
+
+**Example 1:**
+
+```
+Input: n = 2
+Output: ["1/2"]
+Explanation: "1/2" is the only unique fraction with a denominator less-than-or-equal-to 2.
+```
+
+**Example 2:**
+
+```
+Input: n = 3
+Output: ["1/2","1/3","2/3"]
+```
+
+**Example 3:**
+
+```
+Input: n = 4
+Output: ["1/2","1/3","1/4","2/3","3/4"]
+Explanation: "2/4" is not a simplified fraction because it can be simplified to "1/2".
+```
+
+## 结语
+
+如果你同我一样热爱数据结构、算法、LeetCode，可以关注我 GitHub 上的 LeetCode 题解：[awesome-golang-algorithm][me]
+
+[title]: https://leetcode.com/problems/simplified-fractions
+[me]: https://github.com/kylesliu/awesome-golang-algorithm

leetcode/1401-1500/1447.Simplified-Fractions/Solution.go

@@ -1,5 +1,25 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+import "fmt"
+
+func gcd(a, b int) int {
+	if b == 0 {
+		return a
+	}
+	return gcd(b, a%b)
+}
+
+func Solution(n int) []string {
+	in := make(map[string]struct{})
+	for i := 2; i <= n; i++ {
+		for j := 1; j < i; j++ {
+			m := gcd(j, i)
+			in[fmt.Sprintf("%d/%d", j/m, i/m)] = struct{}{}
+		}
+	}
+	ans := make([]string, 0)
+	for i := range in {
+		ans = append(ans, i)
+	}
+	return ans
 }

leetcode/1401-1500/1447.Simplified-Fractions/Solution_test.go

@@ -2,6 +2,7 @@ package Solution
 
 import (
 	"reflect"
+	"sort"
 	"strconv"
 	"testing"
 )
@@ -10,18 +11,19 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs int
+		expect []string
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 2, []string{"1/2"}},
+		{"TestCase2", 3, []string{"1/2", "1/3", "2/3"}},
+		{"TestCase3", 4, []string{"1/2", "1/3", "1/4", "2/3", "3/4"}},
 	}
 
 	//	开始测试
 	for i, c := range cases {
 		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
 			got := Solution(c.inputs)
+			sort.Strings(got)
 			if !reflect.DeepEqual(got, c.expect) {
 				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
 					c.expect, got, c.inputs)
@@ -30,10 +32,10 @@ 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() {
 }