/in/foo.cc: In function 'void dd(int, int)':
/in/foo.cc:7:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s[x].size();i++)
              ~^~~~~~~~~~~~
/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<d[x].size();i++){
                 ~^~~~~~~~~~~~
/in/foo.cc:26:60: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<int> >::value_type {aka int}[int]' for array subscript
             f[x][j+b[x]][0]=max(f[x][j+b[x]][0],f[d[x][i][j][0]+a[d[x][i]]);
                                                            ^
/in/foo.cc:26:75: error: expected ']' before ')' token
             f[x][j+b[x]][0]=max(f[x][j+b[x]][0],f[d[x][i][j][0]+a[d[x][i]]);
                                                                           ^
In file included from /usr/include/c++/6/bits/char_traits.h:39:0,
                 from /usr/include/c++/6/ios:40,
                 from /usr/include/c++/6/istream:38,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from /in/foo.cc:1:
/usr/include/c++/6/bits/stl_algobase.h: In instantiation of 'const _Tp& std::max(const _Tp&, const _Tp&, _Compare) [with _Tp = int; _Compare = int]':
/in/foo.cc:19:60:   required from here
/usr/include/c++/6/bits/stl_algobase.h:268:17: error: '__comp' cannot be used as a function
       if (__comp(__a, __b))
           ~~~~~~^~~~~~~~~~