Add solution and test-cases for problem 970

Author: 0xff-dev

leetcode/901-1000/0970.Powerful-Integers/README.md

@@ -1,28 +1,33 @@
 # [970.Powerful Integers][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
+Given three integers `x`, `y`, and `bound`, return a list of all the **powerful integers** that have a value less than or equal to `bound`.
+
+An integer is **powerful** if it can be represented as `xi + yj` for some integers `i >= 0` and `j >= 0`.
+
+You may return the answer in **any order**. In your answer, each value should occur **at most once**.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: x = 2, y = 3, bound = 10
+Output: [2,3,4,5,7,9,10]
+Explanation:
+2 = 2^0 + 3^0
+3 = 2^1 + 3^0
+4 = 2^0 + 3^1
+5 = 2^1 + 3^1
+7 = 2^2 + 3^1
+9 = 2^3 + 3^0
+10 = 2^0 + 3^2
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Powerful Integers
-```go
 ```
-
+Input: x = 3, y = 5, bound = 15
+Output: [2,4,6,8,10,14]
+```
 
 ## 结语
 

leetcode/901-1000/0970.Powerful-Integers/Solution.go

@@ -1,5 +1,38 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(x int, y int, bound int) []int {
+	xm := map[int]struct{}{
+		1: struct{}{},
+	}
+	ym := map[int]struct{}{
+		1: struct{}{},
+	}
+	if x != 1 {
+		base := x
+		for base <= bound {
+			xm[base] = struct{}{}
+			base *= x
+		}
+	}
+	if y != 1 {
+		base := 1
+		for base <= bound {
+			ym[base] = struct{}{}
+			base *= y
+		}
+	}
+
+	ans := make([]int, 0)
+	exist := make(map[int]struct{})
+	for xi := range xm {
+		for yi := range ym {
+			if r := xi + yi; r <= bound {
+				if _, ok := exist[r]; !ok {
+					exist[r] = struct{}{}
+					ans = append(ans, r)
+				}
+			}
+		}
+	}
+	return ans
 }

leetcode/901-1000/0970.Powerful-Integers/Solution_test.go

@@ -2,38 +2,39 @@ package Solution
 
 import (
 	"reflect"
+	"sort"
 	"strconv"
 	"testing"
 )
 
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name        string
+		x, y, bound int
+		expect      []int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 2, 3, 10, []int{2, 3, 4, 5, 7, 9, 10}},
+		{"TestCase2", 3, 5, 15, []int{2, 4, 6, 8, 10, 14}},
 	}
 
 	//	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.x, c.y, c.bound)
+			sort.Ints(got)
 			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 %v",
+					c.expect, got, c.x, c.y, c.bound)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }