#include <float.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
int *x = malloc(20);
*x = 1;
printf("x: %d\n", *x);
printf("freeing block...\n");
free(x);
return 0;
}