From d583fadd1d679d799631d34e0fe5022e7b9ff454 Mon Sep 17 00:00:00 2001
From: VicRen <vic.ren@me.com>
Date: Fri, 18 Dec 2020 08:51:54 +0800
Subject: [PATCH] 20201218

---
 20201218/main.go      | 33 ++++++++++++++++++++++
 20201218/main_test.go | 65 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 98 insertions(+)
 create mode 100644 20201218/main.go
 create mode 100644 20201218/main_test.go

diff --git a/20201218/main.go b/20201218/main.go
new file mode 100644
index 0000000..8f92dbf
--- /dev/null
+++ b/20201218/main.go
@@ -0,0 +1,33 @@
+package main
+
+func main() {
+
+}
+
+func calculate(src []string) int {
+	var cw string
+	var max int
+	for i := 0; i < len(src)-1; i++ {
+		cw = src[i]
+		cl := len(cw)
+		for j := i + 1; j < len(src); j++ {
+			cw2 := src[j]
+			v := cl * len(cw2)
+			if !hasSameChar(cw, cw2) && (v > max) {
+				max = v
+			}
+		}
+	}
+	return max
+}
+
+func hasSameChar(s1, s2 string) bool {
+	for _, v := range s1 {
+		for _, v2 := range s2 {
+			if v == v2 {
+				return true
+			}
+		}
+	}
+	return false
+}
diff --git a/20201218/main_test.go b/20201218/main_test.go
new file mode 100644
index 0000000..8dc27b9
--- /dev/null
+++ b/20201218/main_test.go
@@ -0,0 +1,65 @@
+package main
+
+import "testing"
+
+func Test_calculate(t *testing.T) {
+	type args struct {
+		src []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"test1",
+			args{src: []string{"abcw", "baz", "foo", "bar", "xtfn", "abcdef"}},
+			16,
+		},
+		{
+			"test2",
+			args{src: []string{"a", "ab", "abc", "d", "cd", "bcd", "abcd"}},
+			4,
+		},
+		{
+			"test3",
+			args{src: []string{"a", "aa", "aaa", "aaaa"}},
+			0,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := calculate(tt.args.src); got != tt.want {
+				t.Errorf("calculate() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_hasSameChar(t *testing.T) {
+	type args struct {
+		s1 string
+		s2 string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			"test1",
+			args{
+				s1: "abc",
+				s2: "ade",
+			},
+			true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := hasSameChar(tt.args.s1, tt.args.s2); got != tt.want {
+				t.Errorf("hasSameChar() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}