0_0_21458821_3955.cpp: In function 'void finds(int, int)':
0_0_21458821_3955.cpp:35:13: error: reference to 'prev' is ambiguous
prev[a[tag][i].next] = a[tag][i].val;
^
0_0_21458821_3955.cpp:25:17: note: candidates are: int prev [1000005]
int sz[1000005],prev[1000005];
^
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_21458821_3955.cpp:2:
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_21458821_3955.cpp: In function 'void cal()':
0_0_21458821_3955.cpp:47:45: error: reference to 'prev' is ambiguous
res = res + (ll)min(sz[i],m) * (ll) prev[i];
^
0_0_21458821_3955.cpp:25:17: note: candidates are: int prev [1000005]
int sz[1000005],prev[1000005];
^
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_21458821_3955.cpp:2:
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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