0_0_21361448_10964.cpp: In function 'void clear()':
0_0_21361448_10964.cpp:18:9: error: reference to 'prev' is ambiguous
memset(prev, -1, sizeof(prev));
^
0_0_21361448_10964.cpp:8:56: note: candidates are: int prev [1000010]
int T, n, m, tot = 0, tail = 0, a[N], sum[N], temp[N], prev[N], root[N];
^
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_21361448_10964.cpp:3:
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_21361448_10964.cpp:18:26: error: reference to 'prev' is ambiguous
memset(prev, -1, sizeof(prev));
^
0_0_21361448_10964.cpp:8:56: note: candidates are: int prev [1000010]
int T, n, m, tot = 0, tail = 0, a[N], sum[N], temp[N], prev[N], root[N];
^
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_21361448_10964.cpp:3:
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_21361448_10964.cpp: In function 'int main()':
0_0_21361448_10964.cpp:96:7: error: reference to 'prev' is ambiguous
if(prev[id] == -1)
^
0_0_21361448_10964.cpp:8:56: note: candidates are: int prev [1000010]
int T, n, m, tot = 0, tail = 0, a[N], sum[N], temp[N], prev[N], root[N];
^
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_21361448_10964.cpp:3:
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_21361448_10964.cpp:99:33: error: reference to 'prev' is ambiguous
int t = modify(root[i - 1], prev[id], -a[i]);
^
0_0_21361448_10964.cpp:8:56: note: candidates are: int prev [1000010]
int T, n, m, tot = 0, tail = 0, a[N], sum[N], temp[N], prev[N], root[N];
^
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_21361448_10964.cpp:3:
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_21361448_10964.cpp:102:4: error: reference to 'prev' is ambiguous
prev[id] = i;
^
0_0_21361448_10964.cpp:8:56: note: candidates are: int prev [1000010]
int T, n, m, tot = 0, tail = 0, a[N], sum[N], temp[N], prev[N], root[N];
^
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_21361448_10964.cpp:3:
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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