88. Implement Stack Using Array with Push and Pop Operations

#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define MAX 10

void process_stack(int n) {
    // Your logic here
    int stack[MAX];
    int key = -1;
    char op[10];
    int val;

    for (int i = 0; i < n; i++) {
        scanf("%s", op);

        if (strcmp(op, "push") == 0) {
            scanf("%d", &val);
            if (key >= MAX - 1) {
                printf("Stack Overflow\n");
            } else {
                stack[++key] = val;
            }
        } else if (strcmp(op, "pop") == 0) {
            if (key == -1) {
                printf("Stack Underflow\n");
            } else {
                printf("%d\n", stack[key--]);
            }
        }
    }
}

int main() {
    int n;
    scanf("%d", &n);
    getchar(); // Consume newline after number

    process_stack(n);
    return 0;
}