請大神幫我分析一下這串代碼，看不懂

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

//定義結點
typedef struct LinkList
{
    int data;
    struct LinkList *next;
}node;
//初始化鏈表
void Initialise(node **pNode,int item)//**pNode 指向指標的指標   指向的物件pNode還是指標
{
    node *tmp;
    node *target;
    int i=1;
    while(i <= item)
    {
        if(* pNode == NULL)
        {
            *pNode = (node *)malloc(sizeof(LinkList));
            if(!(* pNode))
            {
                exit(0);//退出
            }
            (*pNode)->data = i;
            (*pNode)->next = *pNode ;
            i++;
        }
        else
        {
            target = *pNode;
            while(target->next != *pNode)
            {
                target = target->next ;
            }
            tmp = (node*)malloc(sizeof(LinkList ));
            if(! tmp)
            {
                exit(0);
            }
            tmp->data = i;
            i++;
            tmp->next  = *pNode ;
            target->next  = tmp;
        }
    }
}
//遍歷鏈表
void Traversal(node *pNode)
{
    node *tmp;
    tmp = pNode;
    printf("\n\t\t*****************************鏈表元素*********************************\n\n");
    do
    {
        printf("\t%d",tmp->data );
        tmp = tmp->next ;
    }while(tmp->next != pNode);
    printf("\t%d",tmp->data );
    puts("");
}
//洗掉結點(殺人)
void DeleteNode(node **pNode,int x,int y)
{
    int people = 1;
    int Key[80];
    printf("請依次輸入每人的密碼(使用空格隔開)：\n\n");
    for(int i=1;i<=y;++i)
    {
        scanf("%d",&Key[i]);
        
    }
    printf("出列順序：\n\n");
    node *target;
    target = *pNode ;
    while(people <= y)
    {
        node *tmp;
        if(people != 1)
        {
            target = target->next ;
        }
        if(x != 1)
        {
            for(int i=1;i<x-1;++i)
            {
                target = target->next ;
            }
            tmp = target->next ;
            printf("%d\t",tmp->data );//列印洗掉結點標號
            x = Key[tmp->data ];
            target->next  = tmp ->next ;
            free(tmp);
        }
        else
        {
            printf("%d\t",target->data );
        }
        people++;
    }
}


int main()
{
    printf("Designer by MaLong\n");
    printf("\n\t\t**********************************************************************\n");
    printf("\t\t*                                                                    *\n");
    printf("\t\t*                                                                    *\n");
    printf("\t\t********************歡迎來到約瑟夫殺人游戲****************************\n");
    printf("\t\t*                                                                    *\n");
    printf("\t\t*                                                                    *\n");
    printf("\t\t**********************************************************************\n\n\n\n");
    int x,y;
    printf("請輸入參與游戲的人數:\n");
    scanf("%d",&y);
    printf("請輸入初始密碼:\n");
    scanf("%d",&x);
    node *head = NULL;
    Initialise (&head,y);
    Traversal (head);
    DeleteNode (&head,x,y);
    return 0;
    }

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