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/*
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*/
#include <stdio.h>
typedef struct list {
int data;
struct list *next;
} LIST;
/* Method 1: check the occurrence of p->next from head to p */
int check_circle_1(LIST *head) {
LIST *p = head, *q= NULL;
if (p == NULL)
return 0;
while (p->next) {
/* check whether p points to itself */
if (p->next == p) {
return 1;
}
/* check the occurrence of p->next in head to p */
q = head;
while (q != p) {
if (q == p->next) {
return 1;
}
q = q->next;
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*/
/* Êä³ö1,2,3,..,nµÄ×éºÏÊý */
#include <stdio.h>
#include <assert.h>
#include <malloc.h>
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