Merge pull request #878 from 0xff-dev/1553

Add solution and test-cases for problem 1553

leetcode/1501-1600/1553.Minimum-Number-of-Days-to-Eat-N-Oranges/README.md

@@ -1,28 +1,40 @@
 # [1553.Minimum Number of Days to Eat N Oranges][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
+There are `n` oranges in the kitchen and you decided to eat some of these oranges every day as follows:
+
+- Eat one orange.
+- If the number of remaining oranges `n` is divisible by `2` then you can eat `n / 2` oranges.
+- If the number of remaining oranges `n` is divisible by `3` then you can eat `2 * (n / 3)` oranges.
+
+You can only choose one of the actions per day.
+
+Given the integer `n`, return the minimum number of days to eat `n` oranges.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: n = 10
+Output: 4
+Explanation: You have 10 oranges.
+Day 1: Eat 1 orange,  10 - 1 = 9.  
+Day 2: Eat 6 oranges, 9 - 2*(9/3) = 9 - 6 = 3. (Since 9 is divisible by 3)
+Day 3: Eat 2 oranges, 3 - 2*(3/3) = 3 - 2 = 1. 
+Day 4: Eat the last orange  1 - 1  = 0.
+You need at least 4 days to eat the 10 oranges.
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Minimum Number of Days to Eat N Oranges
-```go
 ```
-
+Input: n = 6
+Output: 3
+Explanation: You have 6 oranges.
+Day 1: Eat 3 oranges, 6 - 6/2 = 6 - 3 = 3. (Since 6 is divisible by 2).
+Day 2: Eat 2 oranges, 3 - 2*(3/3) = 3 - 2 = 1. (Since 3 is divisible by 3)
+Day 3: Eat the last orange  1 - 1  = 0.
+You need at least 3 days to eat the 6 oranges.
+```
 
 ## 结语
 

leetcode/1501-1600/1553.Minimum-Number-of-Days-to-Eat-N-Oranges/Solution.go

@@ -1,5 +1,37 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(n int) int {
+	// dfs内存爆了，试试bfs
+	in := make(map[int]struct{})
+	queue := [][2]int{{n, 0}}
+	for len(queue) > 0 {
+		nq := make([][2]int, 0)
+		for _, cur := range queue {
+			if cur[0] == 1 {
+				return cur[1] + 1
+			}
+			next := cur[0] - 1
+			if _, ok := in[next]; !ok {
+				in[next] = struct{}{}
+				nq = append(nq, [2]int{next, cur[1] + 1})
+			}
+			if cur[0]%2 == 0 {
+				next = cur[0] / 2
+				if _, ok := in[next]; !ok {
+					in[next] = struct{}{}
+					nq = append(nq, [2]int{next, cur[1] + 1})
+				}
+			}
+
+			if cur[0]%3 == 0 {
+				next = cur[0] / 3
+				if _, ok := in[next]; !ok {
+					in[next] = struct{}{}
+					nq = append(nq, [2]int{next, cur[1] + 1})
+				}
+			}
+		}
+		queue = nq
+	}
+	return -1
 }

leetcode/1501-1600/1553.Minimum-Number-of-Days-to-Eat-N-Oranges/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", 2000000000, 32},
+		{"TestCase2", 10, 4},
+		{"TestCase3", 6, 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() {
 }