From 21a2b9cd69307b16c3b5faeecc36f84a6a05dc2e Mon Sep 17 00:00:00 2001
From: VicRen <vic.ren@me.com>
Date: Thu, 26 Nov 2020 08:36:38 +0800
Subject: [PATCH] 20201126

---
 20201126/main.go      |  74 ++++++++++++++++++++++++++
 20201126/main_test.go | 121 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 195 insertions(+)
 create mode 100644 20201126/main.go
 create mode 100644 20201126/main_test.go

diff --git a/20201126/main.go b/20201126/main.go
new file mode 100644
index 0000000..279a949
--- /dev/null
+++ b/20201126/main.go
@@ -0,0 +1,74 @@
+package main
+
+func main() {
+
+}
+
+func findMaxSubLen(src string) int {
+	l := 0
+	r := 0
+	max := 0
+	sm := make(map[uint8]struct{})
+	for {
+		if l == len(src) {
+			return max
+		}
+		for {
+			if r == len(src) {
+				return max
+			}
+			c := src[r]
+			if _, found := sm[c]; found {
+				sm = make(map[uint8]struct{})
+				l++
+				r = l
+				break
+			} else {
+				sm[c] = struct{}{}
+				if len(sm) > max {
+					max = len(sm)
+				}
+				r++
+			}
+		}
+	}
+}
+
+func findMaxSubLen2(src string) int {
+	l := 0
+	r := 0
+	max := 0
+	var ss []uint8
+	for {
+		if l == len(src) {
+			return max
+		}
+		for {
+			if r == len(src) {
+				return max
+			}
+			c := src[r]
+			if i := indexOfValue(c, ss); i != -1 {
+				ss = ss[i:]
+				l += i + 1
+				r++
+				break
+			} else {
+				ss = append(ss, c)
+				if len(ss) > max {
+					max = len(ss)
+				}
+				r++
+			}
+		}
+	}
+}
+
+func indexOfValue(n uint8, src []uint8) int {
+	for i := len(src) - 1; i >= 0; i-- {
+		if src[i] == n {
+			return i
+		}
+	}
+	return -1
+}
diff --git a/20201126/main_test.go b/20201126/main_test.go
new file mode 100644
index 0000000..553a3bc
--- /dev/null
+++ b/20201126/main_test.go
@@ -0,0 +1,121 @@
+package main
+
+import "testing"
+
+func Test_findMaxSubLen(t *testing.T) {
+	type args struct {
+		src string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"example_1",
+			args{"abccefg"},
+			4,
+		},
+		{
+			"example_2",
+			args{"bbbbb"},
+			1,
+		},
+		{
+			"example_3",
+			args{"pwwkew"},
+			3,
+		},
+		{
+			"example_4",
+			args{""},
+			0,
+		},
+		{
+			"example_5",
+			args{"2"},
+			1,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := findMaxSubLen(tt.args.src); got != tt.want {
+				t.Errorf("findMaxSubLen() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_findMaxSubLen2(t *testing.T) {
+	type args struct {
+		src string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"example_1",
+			args{"abccefg"},
+			4,
+		},
+		{
+			"example_2",
+			args{"bbbbb"},
+			1,
+		},
+		{
+			"example_3",
+			args{"pwwkew"},
+			3,
+		},
+		{
+			"example_4",
+			args{""},
+			0,
+		},
+		{
+			"example_5",
+			args{"2"},
+			1,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := findMaxSubLen2(tt.args.src); got != tt.want {
+				t.Errorf("findMaxSubLen2() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_hasValue(t *testing.T) {
+	type args struct {
+		n   uint8
+		src []uint8
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"test1",
+			args{1, []uint8{1, 2}},
+			0,
+		},
+		{
+			"test2",
+			args{1, []uint8{3, 2}},
+			-1,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := indexOfValue(tt.args.n, tt.args.src); got != tt.want {
+				t.Errorf("indexOfValue() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}