Stack Size: Push and Pop Operations
What is the highest number of stack elements that will be used when running the provided code?
a. 1
b. 2
c. 3
d. 4
e. 5
Final answer: 2
Answer:
The code provided manipulates a stack with push and pop operations based on odd and even numbers. After analyzing the operations, the highest stack size observed is 2.
Explanation:
We need to determine the highest number of stack elements used when running the code:
1. 3 (odd): push to stack. Stack now has [3].
2. 3 (odd): push to stack. Stack now has [3, 3].
3. 10 (even): pop from stack. Stack now has [3].
4. 7 (odd): push to stack. Stack now has [3, 7].
5. 4 (even): pop from stack. Stack now has [3] (since 7 was greater than 4, 4 is pushed to stack but 3 is already there).
6. 3 (odd): push to stack. Stack now has [3, 3].
7. 0 (even): pop from stack. Stack now has [3].
Therefore, the highest stack size occurs with two elements [3, 3], leading to the final answer of 2.