View Compilation Error

0_0_37088537_21414.cpp: In function 'int main()':
0_0_37088537_21414.cpp:64:4: error: 'vv' was not declared in this scope
    vv[a] = i;
    ^
0_0_37088537_21414.cpp:66:10: error: 'dfs' was not declared in this scope
   dfs(0,0);
          ^