Eroare de compilare: user.cpp: In function ‘int query(nod*, int, int, int, int)’: user.cpp:49:19: warning: division by zero [-Wdiv-by-zero] return le/0; ^ user.cpp: In function ‘int main()’: user.cpp:79:9: error: reference to ‘prev’ is ambiguous prev[i]=lv[in[i]]; ^ user.cpp:20:27: note: candidates are: int prev [100005] int in[nmax+5],lv[nmax+5],prev[nmax+5]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:93:16: error: reference to ‘prev’ is ambiguous if(prev[j]!=0) ^ user.cpp:20:27: note: candidates are: int prev [100005] int in[nmax+5],lv[nmax+5],prev[nmax+5]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:94:36: error: reference to ‘prev’ is ambiguous update(root,1,n,-in[j],prev[j]); ^ user.cpp:20:27: note: candidates are: int prev [100005] int in[nmax+5],lv[nmax+5],prev[nmax+5]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/algorithm:61, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:71:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distincte.in","r",stdin); ^ user.cpp:72:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distincte.out","w",stdout); ^ user.cpp:75:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&k,&m); ^