online_judge_1189

#include <stdio.h>#include <stdlib.h>typedef struct Node{    int data;    struct Node *next;}Node,*Link;int main(){    int i,j;    Link head,s,r;    s=(Link)malloc(sizeof(Node));    head=s;    s->next=head;    s->data=1;    for(i=2;i<=21;i++)    {        r=(Link)malloc(sizeof(Node));        r->data=i;        r->next=head;        s->next=r;        s=r;    }    for(i=0;i<20;i++)    {        for(j=0;j<16;j++)            s=s->next;        r=s->next;        s->next=r->next;        free(r);    }    printf("%d\n",s->data);    return 0;}