Undo Operation

Medium Stack: Applications PRO

🔒 Login to Unlock

Problem Statement

Write a C program to simulate text editor undo/redo or operation history using a stack.

Input Format

First line contains n operations. Subsequent lines contain operation codes (1 val for type, 2 for undo).

Output Format

Print the current active sequence of elements in the stack from top to bottom separated by spaces.

Constraints

1 <= n <= 50

Sample Input

Sample Output

30 10

Explanation

Push typed characters or states onto a stack for insertions, and pop from the stack when an undo command is received.

Starter Code

#include <stdio.h>
#include <stdlib.h>

int main() {
    int n;
    if (scanf("%d", &n) == 1) {
        // Write your code here to simulate undo operation using stack
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

🔒 Login to Unlock