Add solution and test-cases for problem 2579

leetcode/2501-2600/2579.Count-Total-Number-of-Colored-Cells/README.md

@@ -0,0 +1,37 @@
+# [2579.Count Total Number of Colored Cells][title]
+
+## Description
+There exists an infinitely large two-dimensional grid of uncolored unit cells. You are given a positive integer `n`, indicating that you must do the following routine for `n` minutes:
+
+- At the first minute, color **any** arbitrary unit cell blue.
+- Every minute thereafter, color blue **every** uncolored cell that touches a blue cell.
+
+Below is a pictorial representation of the state of the grid after minutes 1, 2, and 3.
+
+
+![1](./1.png)
+
+Return the number of colored cells at the end of n minutes.
+
+**Example 1:**
+
+```
+Input: n = 1
+Output: 1
+Explanation: After 1 minute, there is only 1 blue cell, so we return 1.
+```
+
+**Example 2:**
+
+```
+Input: n = 2
+Output: 5
+Explanation: After 2 minutes, there are 4 colored cells on the boundary and 1 in the center, so we return 5.
+```
+
+## 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/grid-illumination/
+[me]: https://github.com/kylesliu/awesome-golang-algorithm

leetcode/2501-2600/2579.Count-Total-Number-of-Colored-Cells/Solution.go

@@ -1,5 +1,12 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(n int) int64 {
+	ans := int64(1)
+	var add int64
+	for i := 2; i <= n; i++ {
+		add = int64(i-1) * 4
+		ans += add
+	}
+
+	return ans
 }

leetcode/2501-2600/2579.Count-Total-Number-of-Colored-Cells/Solution_test.go

@@ -10,12 +10,13 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs int
+		expect int64
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 1, 1},
+		{"TestCase2", 2, 5},
+		{"TestCase3", 3, 13},
+		{"TestCase4", 4, 25},
 	}
 
 	//	开始测试
@@ -30,10 +31,10 @@ 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() {
 }