0_0_21716155_7105.cpp: In function 'bool spfa()':
0_0_21716155_7105.cpp:67:5: error: reference to 'prev' is ambiguous
prev[v] = u;
^
0_0_21716155_7105.cpp:45:5: note: candidates are: int prev [510]
int prev[maxn],pree[maxn];
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:40,
from 0_0_21716155_7105.cpp:5:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
prev(_BidirectionalIterator __x, typename
^
0_0_21716155_7105.cpp: In function 'void augment()':
0_0_21716155_7105.cpp:91:7: error: reference to 'prev' is ambiguous
u = prev[u];
^
0_0_21716155_7105.cpp:45:5: note: candidates are: int prev [510]
int prev[maxn],pree[maxn];
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:40,
from 0_0_21716155_7105.cpp:5:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
prev(_BidirectionalIterator __x, typename
^
0_0_21716155_7105.cpp:98:7: error: reference to 'prev' is ambiguous
u = prev[u];
^
0_0_21716155_7105.cpp:45:5: note: candidates are: int prev [510]
int prev[maxn],pree[maxn];
^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:66:0,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:40,
from 0_0_21716155_7105.cpp:5:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type)
prev(_BidirectionalIterator __x, typename
^
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