View Compilation Error

0_0_25607271_13570.cpp: In function 'int main()':
0_0_25607271_13570.cpp:65:34: error: 'mark' was not declared in this scope
   for(int i=1; i<=100000; i++)if(mark[i])q[i].clear();
                                  ^
0_0_25607271_13570.cpp:66:10: error: 'mark' was not declared in this scope
   memset(mark,0,sizeof(mark));
          ^