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

int main(void) {
    int stack_val = 42;
    printf("Allocated on stack: %d\n", stack_val);
    int *heap_val = (int *)malloc(sizeof(int));
    if (heap_val == NULL) {
        printf("Heap allocation failed\n");
        return 1;
    }
    *heap_val = 99;
    printf("Allocated on heap: %d\n", *heap_val);
    const char *original = "OSTEP";
    char *copy = (char *)malloc(strlen(original) + 1);
    if (copy == NULL) {
        free(heap_val);
        printf("String allocation failed\n");
        return 1;
    }
    strcpy(copy, original);
    printf("String copy: %s\n", copy);
    free(copy);
    free(heap_val);
    printf("All heap memory released\n");
    return 0;
}