View Compilation Error

0_0_34017143_4677.cpp: In function 'int main()':
0_0_34017143_4677.cpp:62:38: error: 'val' was not declared in this scope
             fa[i] = i, V[i].clear(), val[i] = 0;
                                      ^
0_0_34017143_4677.cpp:69:9: error: 'val' was not declared in this scope
         val[root] = 0;
         ^