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Stack & Queue 4: Stack using two queues | Must Do Coding Questions | GeeksForGeeks
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This video contains Must Do Coding Questions for Companies like Amazon, Microsoft, Adobe, …
from geeksforgeeks platform.
website link:
Topics covered in this video series are:
1.Arrays
2.String
3.Linked List
4.Stack and Queue
5.Tree and BST
6.Heap
7.Recursion
8.Hashing
9.Graph
10.Greedy
11.Dynamic Programming
12.Divide and Conquer
13.Backtracking
14.Bit Magic
Stack and Queue:
4: Stack using two Queues:
Implement a Stack using two queues q1 and q2.
Example 1:
Input:
push(2)
push(3)
pop()
push(4)
pop()
Output: 3 4
Explanation:
push(2) the stack will be {2}
push(3) the stack will be {2 3}
pop() poped element will be 3 the
stack will be {2}
push(4) the stack will be {2 4}
pop() poped element will be 4
Example 2:
Input:
push(2)
pop()
pop()
push(3)
Output: 2 -1
Code Link:
Intro Music :
from geeksforgeeks platform.
website link:
Topics covered in this video series are:
1.Arrays
2.String
3.Linked List
4.Stack and Queue
5.Tree and BST
6.Heap
7.Recursion
8.Hashing
9.Graph
10.Greedy
11.Dynamic Programming
12.Divide and Conquer
13.Backtracking
14.Bit Magic
Stack and Queue:
4: Stack using two Queues:
Implement a Stack using two queues q1 and q2.
Example 1:
Input:
push(2)
push(3)
pop()
push(4)
pop()
Output: 3 4
Explanation:
push(2) the stack will be {2}
push(3) the stack will be {2 3}
pop() poped element will be 3 the
stack will be {2}
push(4) the stack will be {2 4}
pop() poped element will be 4
Example 2:
Input:
push(2)
pop()
pop()
push(3)
Output: 2 -1
Code Link:
Intro Music :
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