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

int main() {
	int *foo=malloc(sizeof(int)*4);
	for(int i = 0; i < 4; ++i) {
		printf("%d ", foo[i]);
		foo[i] = i;
	}
	free(foo);
	puts("");
	foo = malloc(sizeof(int)*4);
	for(int i = 0; i < 4; ++i) {
		printf("%d ", foo[i]);
	}
	return 0;
}