#include <stdio.h>
#include <stdlib.h>
struct list {
int key;
struct list *next;
};
struct list *append(struct list **l1, int k)
{
(*l1)->key = k;
return *l1;
}
int main(void)
{
struct list *l;
int i;
for (i = 0; i < 42; ++i)
l = append(&l, i);
}
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