为什么会WA 求大神 orz

#include<cstdio>
#include<cstring>
using namespace std;
template<class _T>inline void read(_T &_a)
{
    bool f=0;char _ch=getchar();_a=0;
    while(_ch<'0'||_ch>'9'){if(_ch=='-')f=1;_ch=getchar();}
    while(_ch>='0'&&_ch<='9'){_a=(_a<<1)+(_a<<3)+_ch-'0';_ch=getchar();}
    if(f)_a=-_a;
}

struct node{ int clock[10],ser[10],caoz[1001],cnt; }team[50001];

inline void rush(int *clock,int *pre_clock,int type)
{
    for (register int i=1;i<=9;++i) clock[i]=pre_clock[i];
    switch(type)
    {
        case 1:
            {
                clock[1]=(pre_clock[1]+1)%4; //A
                clock[2]=(pre_clock[2]+1)%4; //B
                clock[4]=(pre_clock[4]+1)%4; //D
                clock[5]=(pre_clock[5]+1)%4; //E
                break;
            }
        case 2:
            {
                clock[1]=(pre_clock[1]+1)%4; //A
                clock[2]=(pre_clock[2]+1)%4; //B
                clock[3]=(pre_clock[3]+1)%4; //C
                break;
            }
        case 3:
            {
                clock[2]=(pre_clock[2]+1)%4; //B
                clock[3]=(pre_clock[3]+1)%4; //C
                clock[5]=(pre_clock[5]+1)%4; //E
                clock[6]=(pre_clock[6]+1)%4; //F
                break;
            }
        case 4:
            {
                clock[1]=(pre_clock[1]+1)%4; //A
                clock[4]=(pre_clock[4]+1)%4; //D
                clock[7]=(pre_clock[7]+1)%4; //G
                break;
            }
        case 5:
            {
                clock[2]=(pre_clock[2]+1)%4; //B
                clock[4]=(pre_clock[4]+1)%4; //D
                clock[5]=(pre_clock[5]+1)%4; //E
                clock[6]=(pre_clock[6]+1)%4; //F
                clock[8]=(pre_clock[8]+1)%4; //H
                break;
            }
        case 6:
            {
                clock[3]=(pre_clock[3]+1)%4; //C
                clock[6]=(pre_clock[6]+1)%4; //F
                clock[9]=(pre_clock[9]+1)%4; //I
                break;
            }
        case 7:
            {
                clock[4]=(pre_clock[4]+1)%4; //D
                clock[5]=(pre_clock[5]+1)%4; //E
                clock[7]=(pre_clock[7]+1)%4; //G
                clock[8]=(pre_clock[8]+1)%4; //H
                break;
            }
        case 8:
            {
                clock[7]=(pre_clock[7]+1)%4; //G
                clock[8]=(pre_clock[8]+1)%4; //H
                clock[9]=(pre_clock[9]+1)%4; //I
                break;
            }
        case 9:
            {
                clock[5]=(pre_clock[5]+1)%4; //E
                clock[6]=(pre_clock[6]+1)%4; //F
                clock[8]=(pre_clock[8]+1)%4; //H
                clock[9]=(pre_clock[9]+1)%4; //I
                break;
            }
    }
}

inline bool check(int *clock)
{
    for (register int i=1;i<=9;++i) if(clock[i]) return false;
    return true;
}

int main()
{
    int head=0,tail=1;
    for (register int i=1;i<=9;++i) read(team[1].clock[i]);
    while(head!=tail)
    {
        head=head%50000+1;
        int now=head;
        if(check(team[now].clock)){for (register int v=1;v<=team[now].cnt;++v)printf("%d ",team[now].caoz[v]);return 0;}
        for (register int i=1;i<=9;++i)
        {
            if(team[now].ser[i]>=3) continue;
            tail=tail%50000+1;
            team[tail].cnt=team[now].cnt+1;
            for (register int v=1;v<=9;++v) team[tail].ser[v]=team[now].ser[v];
            ++team[tail].ser[i];
            for (register int v=1;v<team[tail].cnt;++v) team[tail].caoz[v]=team[now].caoz[v];
            team[tail].caoz[team[tail].cnt]=i;
            rush(team[tail].clock,team[now].clock,i);
        }
    }
} 

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ID
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