From dbde6b107df1baa8616d82037d6d4c3a5d321e36 Mon Sep 17 00:00:00 2001
From: VicRen <vic.ren@me.com>
Date: Tue, 5 Jan 2021 09:00:19 +0800
Subject: [PATCH] 20210105

---
 20210105/main.go      | 21 +++++++++++++++++++++
 20210105/main_test.go | 29 +++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 20210105/main.go
 create mode 100644 20210105/main_test.go

diff --git a/20210105/main.go b/20210105/main.go
new file mode 100644
index 0000000..01247bc
--- /dev/null
+++ b/20210105/main.go
@@ -0,0 +1,21 @@
+package main
+
+func main() {
+
+}
+
+func countBalance(s string) int {
+	count, rCount, lCount := 0, 0, 0
+	for i := 0; i < len(s); i++ {
+		if s[i] == 'R' {
+			rCount++
+		} else if s[i] == 'L' {
+			lCount++
+		}
+		if rCount > 0 && rCount == lCount {
+			lCount, rCount = 0, 0
+			count++
+		}
+	}
+	return count
+}
diff --git a/20210105/main_test.go b/20210105/main_test.go
new file mode 100644
index 0000000..4b2f378
--- /dev/null
+++ b/20210105/main_test.go
@@ -0,0 +1,29 @@
+package main
+
+import "testing"
+
+func Test_countBalance(t *testing.T) {
+	type args struct {
+		s string
+	}
+	tests := []struct {
+		name string
+		args args
+		want int
+	}{
+		{
+			"test1",
+			args{
+				"RLRRLLRLRL",
+			},
+			4,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := countBalance(tt.args.s); got != tt.want {
+				t.Errorf("countBalance() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}