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This commit is contained in:
AnupamBahl 2023-10-06 16:55:07 -07:00
parent 885d58f019
commit d9dea17695
1 changed files with 22 additions and 12 deletions
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34
data_structures/stacks/stack_tracking_min_max.py
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@ -1,22 +1,30 @@
"""
Python3 stack implementation that retrieves min/max elements of the stack in constant time
"""
from __future__ import annotations
import math
"""
Object stored on the stack
Python3 stack implementation that retrieves min/max
elements of the stack in constant time
"""
class StackData:
def __init__(self, current_value: float, min_value: float, max_value: float) -> None:
"""
Object stored on the stack
"""
def __init__(self, current_value: float, min_value: float
, max_value: float) -> None:
self.current_value = current_value
self.min_value = min_value
self.max_value = max_value
"""
Main stack implementation
"""
class MinMaxStack:
"""
Main stack implementation
"""
def __init__(self, max_stack_size: int = 10) -> None:
self.max_size = max_stack_size
self.stack = []
@ -35,12 +43,13 @@ class MinMaxStack:
>>> test_stack.push_value(4)
Traceback (most recent call last):
...
Exception: Max stack size reached. Remove elements before adding new ones or increase stack size.
Exception: Max stack size reached. Remove elements before
adding new ones or increase stack size.
"""
if len(self.stack) == self.max_size:
raise Exception("Max stack size reached. Remove elements before adding new ones or increase stack size.")
raise Exception("Max stack size reached.")
if len(self.stack) == 0:
self.stack.append(StackData(value, value, value))
@ -80,7 +89,7 @@ class MinMaxStack:
"""
Get the highest value on the stack in constant time
test_stack = MinMaxStack(3)
>>> test_stack = MinMaxStack(3)
>>> test_stack.push_value(-450.45)
True
>>> test_stack.push_value(450.45)
@ -153,4 +162,5 @@ class MinMaxStack:
if __name__ == "__main__":
from doctest import testmod
testmod()
testmod()