View Compilation Error

0_0_11267237_2907.cpp: In function `void gao(int*, int*)':
0_0_11267237_2907.cpp:39: error: no match for 'operator-' in 'a[i] - (&g)->std::vector<_Tp, _Alloc>::begin [with _Tp = int, _Alloc = std::allocator<int>]()'
GCC/bin/../lib/gcc/mingw32/3.4.2/../../../../include/c++/3.4.2/bits/stl_bvector.h:180: note: candidates are: ptrdiff_t std::operator-(const std::_Bit_iterator_base&, const std::_Bit_iterator_base&)
0_0_11267237_2907.cpp:39: error: expected `)' before ';' token