시간초과 에러나는 코드

wkdghdwns199/스텍_큐_덱/ACM-12789.py

@@ -0,0 +1,17 @@
+N = int(input())
+order_list = list(map(int, input().split()))
+order = 1
+stack = []
+
+for student in order_list :
+    if student > order :
+        stack.append(student)
+    elif student == order :
+        order+=1
+
+while len(stack) !=0 :
+    if len(stack) == 1 or stack[len(stack)-2] > stack[len(stack)-1] : 
+        stack.pop()
+    else : break
+
+print('Nice') if len(stack)==0 else print('Sad')