View Compilation Error

0_0_34675091_22128.cpp: In function 'int find(std::string, int)':
0_0_34675091_22128.cpp:66:43: error: invalid types 'int[int]' for array subscript
         for(int j=cur;j && vis[j] && len[j]<=l;j=fail[j])
                                           ^