View Compilation Error

0_0_34096050_26663.cpp: In function 'int main()':
0_0_34096050_26663.cpp:57:24: error: 'v' was not declared in this scope
             if(visited[v[i])
                        ^
0_0_34096050_26663.cpp:57:28: error: expected ']' before ')' token
             if(visited[v[i])
                            ^