leetcode

leetcode/20.py

@@ -0,0 +1,21 @@
+class Solution:
+    def isValid(self, s: str) -> bool:
+        arr=[]
+
+        for c in s:
+            if c in ['(','{','[']:
+                arr.append(c)
+                continue
+
+            if c in [')','}',']']:
+                if len(arr)<0+1:
+                    return False
+                p=arr.pop()
+
+                if not((c==')' and p=='(') or (c=='}' and p=='{') or (c==']' and p=='[')):
+                    return False
+
+        if len(arr)>0:
+            return False
+        else:
+            return True