View Compilation Error

0_0_6738078_15991.cpp: In function `void update(int, int, int, int, int)':
0_0_6738078_15991.cpp:49: error: 'struct node' has no member named 'c'
0_0_6738078_15991.cpp:50: error: 'struct node' has no member named 'k'
0_0_6738078_15991.cpp:51: error: no matching function for call to `std::vector<nd, std::allocator<nd> >::push_back(node&)'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_vector.h:557: note: candidates are: void std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp = nd, _Alloc = std::allocator<nd>]