Add solution and test-cases for problem 3280

Author: 0xff-dev

leetcode/3201-3300/3280.Convert-Date-to-Binary/README.md

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+# [3280.Convert Date to Binary][title]
+
+## Description
+You are given a string `date` representing a Gregorian calendar date in the `yyyy-mm-dd` format.
+
+`date` can be written in its binary representation obtained by converting year, month, and day to their binary representations without any leading zeroes and writing them down in `year-month-day` format.
+
+Return the **binary** representation of `date`.
+
+**Example 1:**
+
+```
+Input: date = "2080-02-29"
+
+Output: "100000100000-10-11101"
+
+Explanation:
+
+100000100000, 10, and 11101 are the binary representations of 2080, 02, and 29 respectively.
+```
+
+**Example 2:**
+
+```
+Input: date = "1900-01-01"
+
+Output: "11101101100-1-1"
+
+Explanation:
+
+11101101100, 1, and 1 are the binary representations of 1900, 1, and 1 respectively.
+```
+
+## 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/convert-date-to-binary
+[me]: https://github.com/kylesliu/awesome-golang-algorithm

leetcode/3201-3300/3280.Convert-Date-to-Binary/Solution.go

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+package Solution
+
+import "bytes"
+
+func convert(s string) string {
+	base := 0
+	for _, b := range s {
+		base = base*10 + int(b-'0')
+	}
+	buf := bytes.NewBuffer([]byte{})
+	for base > 0 {
+		mod := base & 1
+		if mod == 1 {
+			buf.WriteByte('1')
+		} else {
+			buf.WriteByte('0')
+		}
+		base >>= 1
+	}
+	bs := buf.Bytes()
+	for s, e := 0, len(bs)-1; s < e; s, e = s+1, e-1 {
+		bs[s], bs[e] = bs[e], bs[s]
+	}
+	return string(bs)
+}
+
+func Solution(date string) string {
+	// 0:4, 5:7 8:end
+	return convert(date[:4]) + "-" + convert(date[5:7]) + "-" + convert(date[8:])
+}

leetcode/3201-3300/3280.Convert-Date-to-Binary/Solution_test.go

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+package Solution
+
+import (
+	"reflect"
+	"strconv"
+	"testing"
+)
+
+func TestSolution(t *testing.T) {
+	//	测试用例
+	cases := []struct {
+		name   string
+		inputs string
+		expect string
+	}{
+		{"TestCase1", "2080-02-29", "100000100000-10-11101"},
+		{"TestCase2", "1900-01-01", "11101101100-1-1"},
+	}
+
+	//	开始测试
+	for i, c := range cases {
+		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
+			got := Solution(c.inputs)
+			if !reflect.DeepEqual(got, c.expect) {
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
+					c.expect, got, c.inputs)
+			}
+		})
+	}
+}
+
+// 压力测试
+func BenchmarkSolution(b *testing.B) {
+}
+
+// 使用案列
+func ExampleSolution() {
+}