View Compilation Error

0_0_24073890_23708.cpp:12:3: error: 'b' does not name a type
 };b[maxn*10];
   ^
0_0_24073890_23708.cpp: In function 'void Tarjanx(int, int)':
0_0_24073890_23708.cpp:64:25: error: 'b' was not declared in this scope
  for(int i=headx[x];i;i=b[i].next){
                         ^
0_0_24073890_23708.cpp: In function 'void Update()':
0_0_24073890_23708.cpp:75:31: error: 'b' was not declared in this scope
  memset(a,0,sizeof(a));memset(b,0,sizeof(b));memset(belong,0,sizeof(belong));memset(d,0,sizeof(d));
                               ^
0_0_24073890_23708.cpp: In function 'void Insertx(int, int)':
0_0_24073890_23708.cpp:81:8: error: 'b' was not declared in this scope
  tot++;b[tot].to=y;b[tot].next=headx[x];headx[x]=tot;
        ^
0_0_24073890_23708.cpp: In function 'void Dfs(int, int, int)':
0_0_24073890_23708.cpp:88:25: error: 'b' was not declared in this scope
  for(int i=headx[x];i;i=b[i].next){
                         ^