We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Practice
  2. Data Structures
  3. Stacks
  4. Simple Text Editor
  5. Discussions

Simple Text Editor

  • Python0222 + 1 comment
    class Stack:
    def __init__(self):
        self.name=''
        self.items=['']
        
    def push(self, char):
        self.items.append(self.name+char)
        return self.name+char
    
    def delete(self, k):
        self.name=self.name[:-k]
        self.items.append(self.name)
        
    def undo(self):
        self.items.pop()
        self.name=self.items[-1]
    
    def is_empty(self):
        return self.name == ''

Q=int(input().strip())
string = Stack()
for _ in range(Q):
    x= input().split()
    if x[0]=='1':
        string.name=string.push(x[1])
    elif x[0]=='2':
        string.delete(int(x[1]))
    elif x[0]=='3':
        print(string.name[int(x[1])-1])
    elif x[0]=='4':
        string.undo()
    • teja2213 + 0 comments

      I think you need to first store the string in list and then make changes on string. Need this cahnge in delete and push methods. Otherwise this won't work.