View Compilation Error

0_0_21929775_24317.cpp: In function 'void init()':
0_0_21929775_24317.cpp:25:5: error: 'isbridge' was not declared in this scope
  MS(isbridge,0);
     ^
0_0_21929775_24317.cpp:10:24: note: in definition of macro 'MS'
 #define MS(a,x) memset(a,x,sizeof(a));
                        ^
0_0_21929775_24317.cpp: In function 'void Tarjan(int, int)':
0_0_21929775_24317.cpp:58:5: error: 'isbridge' was not declared in this scope
     isbridge[edge[i].ID] = 1;
     ^
0_0_21929775_24317.cpp: In function 'void dfs_cout(int, int, int)':
0_0_21929775_24317.cpp:70:7: error: 'isbridge' was not declared in this scope
   if(!isbridge[edge[i].ID] && !vist[v])
       ^