feat: add golang solution to lc problem: No.2034

No.2034.Stock Price Fluctuation

Author: maolonglong

solution/2000-2099/2034.Stock Price Fluctuation/README.md

@@ -211,6 +211,68 @@ public:
  */
 ```
 
+### **Go**
+
+```go
+type StockPrice struct {
+	lastTs  int
+	mp      map[int]int
+	counter *redblacktree.Tree
+}
+
+func Constructor() StockPrice {
+	return StockPrice{
+		mp:      make(map[int]int),
+		counter: redblacktree.NewWithIntComparator(),
+	}
+}
+
+func (this *StockPrice) Update(timestamp int, price int) {
+	if timestamp > this.lastTs {
+		this.lastTs = timestamp
+	}
+	if old, ok := this.mp[timestamp]; ok {
+		cnt := getInt(this.counter, old)
+		if cnt == 1 {
+			this.counter.Remove(old)
+		} else {
+			this.counter.Put(old, cnt-1)
+		}
+	}
+	this.mp[timestamp] = price
+	this.counter.Put(price, getInt(this.counter, price)+1)
+}
+
+func (this *StockPrice) Current() int {
+	return this.mp[this.lastTs]
+}
+
+func (this *StockPrice) Maximum() int {
+	return this.counter.Right().Key.(int)
+}
+
+func (this *StockPrice) Minimum() int {
+	return this.counter.Left().Key.(int)
+}
+
+func getInt(rbt *redblacktree.Tree, key int) int {
+	val, found := rbt.Get(key)
+	if !found {
+		return 0
+	}
+	return val.(int)
+}
+
+/**
+ * Your StockPrice object will be instantiated and called as such:
+ * obj := Constructor();
+ * obj.Update(timestamp,price);
+ * param_2 := obj.Current();
+ * param_3 := obj.Maximum();
+ * param_4 := obj.Minimum();
+ */
+```
+
 ### **...**
 
 ```

solution/2000-2099/2034.Stock Price Fluctuation/README_EN.md

@@ -202,6 +202,68 @@ public:
  */
 ```
 
+### **Go**
+
+```go
+type StockPrice struct {
+	lastTs  int
+	mp      map[int]int
+	counter *redblacktree.Tree
+}
+
+func Constructor() StockPrice {
+	return StockPrice{
+		mp:      make(map[int]int),
+		counter: redblacktree.NewWithIntComparator(),
+	}
+}
+
+func (this *StockPrice) Update(timestamp int, price int) {
+	if timestamp > this.lastTs {
+		this.lastTs = timestamp
+	}
+	if old, ok := this.mp[timestamp]; ok {
+		cnt := getInt(this.counter, old)
+		if cnt == 1 {
+			this.counter.Remove(old)
+		} else {
+			this.counter.Put(old, cnt-1)
+		}
+	}
+	this.mp[timestamp] = price
+	this.counter.Put(price, getInt(this.counter, price)+1)
+}
+
+func (this *StockPrice) Current() int {
+	return this.mp[this.lastTs]
+}
+
+func (this *StockPrice) Maximum() int {
+	return this.counter.Right().Key.(int)
+}
+
+func (this *StockPrice) Minimum() int {
+	return this.counter.Left().Key.(int)
+}
+
+func getInt(rbt *redblacktree.Tree, key int) int {
+	val, found := rbt.Get(key)
+	if !found {
+		return 0
+	}
+	return val.(int)
+}
+
+/**
+ * Your StockPrice object will be instantiated and called as such:
+ * obj := Constructor();
+ * obj.Update(timestamp,price);
+ * param_2 := obj.Current();
+ * param_3 := obj.Maximum();
+ * param_4 := obj.Minimum();
+ */
+```
+
 ### **...**
 
 ```

solution/2000-2099/2034.Stock Price Fluctuation/Solution.go

@@ -0,0 +1,57 @@
+type StockPrice struct {
+	lastTs  int
+	mp      map[int]int
+	counter *redblacktree.Tree
+}
+
+func Constructor() StockPrice {
+	return StockPrice{
+		mp:      make(map[int]int),
+		counter: redblacktree.NewWithIntComparator(),
+	}
+}
+
+func (this *StockPrice) Update(timestamp int, price int) {
+	if timestamp > this.lastTs {
+		this.lastTs = timestamp
+	}
+	if old, ok := this.mp[timestamp]; ok {
+		cnt := getInt(this.counter, old)
+		if cnt == 1 {
+			this.counter.Remove(old)
+		} else {
+			this.counter.Put(old, cnt-1)
+		}
+	}
+	this.mp[timestamp] = price
+	this.counter.Put(price, getInt(this.counter, price)+1)
+}
+
+func (this *StockPrice) Current() int {
+	return this.mp[this.lastTs]
+}
+
+func (this *StockPrice) Maximum() int {
+	return this.counter.Right().Key.(int)
+}
+
+func (this *StockPrice) Minimum() int {
+	return this.counter.Left().Key.(int)
+}
+
+func getInt(rbt *redblacktree.Tree, key int) int {
+	val, found := rbt.Get(key)
+	if !found {
+		return 0
+	}
+	return val.(int)
+}
+
+/**
+ * Your StockPrice object will be instantiated and called as such:
+ * obj := Constructor();
+ * obj.Update(timestamp,price);
+ * param_2 := obj.Current();
+ * param_3 := obj.Maximum();
+ * param_4 := obj.Minimum();
+ */