0_0_29510959_4466.cpp: In function 'void augment(int)':
0_0_29510959_4466.cpp:58:19: error: reference to 'prev' is ambiguous
int pv=mx[prev[v]];
^
0_0_29510959_4466.cpp:20:5: note: candidates are: int prev [505]
int prev[N],slack[N]; //prev[i]为Y中i点在交错树上的前点；slack为松弛量
^
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++/algorithm:61,
from 0_0_29510959_4466.cpp:4:
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_29510959_4466.cpp:59:12: error: reference to 'prev' is ambiguous
mx[prev[v]]=v; my[v]=prev[v];v=pv;
^
0_0_29510959_4466.cpp:20:5: note: candidates are: int prev [505]
int prev[N],slack[N]; //prev[i]为Y中i点在交错树上的前点；slack为松弛量
^
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++/algorithm:61,
from 0_0_29510959_4466.cpp:4:
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_29510959_4466.cpp:59:30: error: reference to 'prev' is ambiguous
mx[prev[v]]=v; my[v]=prev[v];v=pv;
^
0_0_29510959_4466.cpp:20:5: note: candidates are: int prev [505]
int prev[N],slack[N]; //prev[i]为Y中i点在交错树上的前点；slack为松弛量
^
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++/algorithm:61,
from 0_0_29510959_4466.cpp:4:
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_29510959_4466.cpp: In function 'bool bfs()':
0_0_29510959_4466.cpp:78:55: error: reference to 'prev' is ambiguous
if(slack[i]>ex){ slack[i]=ex; prev[i]=u; }
^
0_0_29510959_4466.cpp:20:5: note: candidates are: int prev [505]
int prev[N],slack[N]; //prev[i]为Y中i点在交错树上的前点；slack为松弛量
^
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++/algorithm:61,
from 0_0_29510959_4466.cpp:4:
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_29510959_4466.cpp:80:28: error: reference to 'prev' is ambiguous
else { prev[i]=u; sy[i]=true; q[tail++]=i*2+1; }
^
0_0_29510959_4466.cpp:20:5: note: candidates are: int prev [505]
int prev[N],slack[N]; //prev[i]为Y中i点在交错树上的前点；slack为松弛量
^
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++/algorithm:61,
from 0_0_29510959_4466.cpp:4:
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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