Update 1221.分割平衡字符串.md

added python and go solution to 1221

problems/1221.分割平衡字符串.md

@@ -108,11 +108,38 @@ class Solution {
 ### Python
 
 ```python
+class Solution:
+    def balancedStringSplit(self, s: str) -> int:
+        diff = 0 #右左差值
+        ans = 0
+        for c in s:
+            if c == "L":
+                diff -= 1
+            else:
+                diff += 1
+            if tilt == 0:
+                ans += 1
+        return ans
 ```
 
 ### Go
 
 ```go
+func balancedStringSplit(s string) int {
+    diff := 0 // 右左差值
+    ans := 0
+    for _, c := range s {
+        if c == 'L' {
+            diff--
+        }else {
+            diff++
+        }
+        if diff == 0 {
+            ans++
+        }
+    }
+    return ans
+}
 ```
 
 ### JavaScript