Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10

void process_stack(int n) {
    // Your logic here
    int buffer[MAX] = {0};
    int top = 0;
    for (int i = 0; i < n; ++i) {
        char op[5];
        int value;
        scanf("%s %d", op, &value);
        if (strcmp(op, "push") == 0) {
            if (top < MAX) buffer[top++] = value;
            else printf("Stack Overflow\n");
        } else {
            if (top > 0) printf("%d\n", buffer[--top]);
            else printf("Stack Underflow\n");
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach