add new solutions

solutions/11/q1114/solution.go

@@ -0,0 +1,35 @@
+package q1114
+
+type Foo struct {
+	one, two chan struct{}
+}
+
+func NewFoo() *Foo {
+	return &Foo{
+		one: make(chan struct{}),
+		two: make(chan struct{}),
+	}
+}
+
+func (f *Foo) First(printFirst func()) {
+	// Do not change this line
+	printFirst()
+
+	close(f.one)
+}
+
+func (f *Foo) Second(printSecond func()) {
+	<-f.one
+
+	/// Do not change this line
+	printSecond()
+
+	close(f.two)
+}
+
+func (f *Foo) Third(printThird func()) {
+	<-f.two
+
+	// Do not change this line
+	printThird()
+}