0_0_15769411_31124.cpp: In function 'void dfs(int)':
0_0_15769411_31124.cpp:13:32: error: reference to 'next' is ambiguous
for (int i = head[u]; ~i; i = next[i]) {
^
0_0_15769411_31124.cpp:9:17: note: candidates are: int next [524288]
int head[MAXN], next[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++/algorithm:61,
from 0_0_15769411_31124.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
0_0_15769411_31124.cpp: In function 'void calc(int)':
0_0_15769411_31124.cpp:22:32: error: reference to 'next' is ambiguous
for (int i = head[u]; ~i; i = next[i]) {
^
0_0_15769411_31124.cpp:9:17: note: candidates are: int next [524288]
int head[MAXN], next[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++/algorithm:61,
from 0_0_15769411_31124.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
0_0_15769411_31124.cpp: In function 'int main()':
0_0_15769411_31124.cpp:36:32: error: 'memset' was not declared in this scope
memset(head, -1, sizeof(head));
^
0_0_15769411_31124.cpp:40:4: error: reference to 'next' is ambiguous
next[i] = head[f[i]];
^
0_0_15769411_31124.cpp:9:17: note: candidates are: int next [524288]
int head[MAXN], next[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++/algorithm:61,
from 0_0_15769411_31124.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_iterator_base_funcs.h:184:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type)
next(_ForwardIterator __x, typename
^
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