class MyQueue:
def __init__(self):
"""
Initialize your data structure here.
"""
self.k = []
def push(self, x: int) -> None:
"""
Push element x to the back of queue.
"""
self.k.append(x)
def pop(self) -> int:
"""
Removes the element from in front of queue and returns that element.
"""
return self.k.pop(0)
def peek(self) -> int:
"""
Get the front element.
"""
return self.k[0]
def empty(self) -> bool:
"""
Returns whether the queue is empty.
"""
if len(self.k) == 0:
return True
return False
# Your MyQueue object will be instantiated and called as such:
# obj = MyQueue()
# obj.push(x)
# param_2 = obj.pop()
# param_3 = obj.peek()
# param_4 = obj.empty()
32. Longest Valid Parentheses | Cutting a material |
Bubble Sort | Number of triangles |
AND path in a binary tree | Factorial equations |
Removal of vertices | Happy segments |
Cyclic shifts | Zoos |
Build a graph | Almost correct bracket sequence |
Count of integers | Differences of the permutations |
Doctor's Secret | Back to School |
I am Easy | Teddy and Tweety |
Partitioning binary strings | Special sets |
Smallest chosen word | Going to office |
Color the boxes | Missing numbers |
Maximum sum | 13 Reasons Why |
Friend's Relationship | Health of a person |
Divisibility | A. Movement |