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0_0_39686834_19689.cpp: In function 'std::vector<std::vector<long long int> > matrixPower(const std::vector<std::vector<long long int> >&, ll, ll)':
0_0_39686834_19689.cpp:28:46: error: passing 'const std::vector<std::vector<long long int> >' as 'this' argument discards qualifiers [-fpermissive]
   28 |         base = matrixMultiply(base, base, mod);
      |                                              ^
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/vector:66,
                 from 0_0_39686834_19689.cpp:2:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/stl_vector.h:761:7: note:   in call to 'constexpr std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::vector<long long int>; _Alloc = std::allocator<std::vector<long long int> >]'
  761 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~