View Compilation Error

0_0_13526785_22363.cpp: In function 'void dfs(int)':
0_0_13526785_22363.cpp:49:5: error: 'en' was not declared in this scope
     en[u] = cnt;
     ^
0_0_13526785_22363.cpp: In function 'int main()':
0_0_13526785_22363.cpp:155:35: error: 'en' was not declared in this scope
                 update(1,start[u],en[u],v);
                                   ^