邻接表存图封装

struct TU{
    int k,h[N];
    TU(){k=0;memset(h,0,sizeof(h));}
    struct AB{
        int a,b,c,n;
    }d[N*2];
    void cun(int x,int y,int z){d[++k]=(AB){x,y,z,h[x]},h[x]=k;}
}g;