Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:23:13: error: reference to ‘next’ is ambiguous next[st.top()]=i,st.pop(); ^ user.cpp:12:20: note: candidates are: long long int next [1000005] long long dp[nmax],next[nmax]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/deque:60, from /usr/include/c++/4.8/stack:60, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:28:12: error: reference to ‘next’ is ambiguous if(next[i]) ^ user.cpp:12:20: note: candidates are: long long int next [1000005] long long dp[nmax],next[nmax]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/deque:60, from /usr/include/c++/4.8/stack:60, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:29:24: error: reference to ‘next’ is ambiguous dp[i]=1+dp[next[i]+1],ans+=dp[i]; ^ user.cpp:12:20: note: candidates are: long long int next [1000005] long long dp[nmax],next[nmax]; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/deque:60, from /usr/include/c++/4.8/stack:60, from user.cpp:2: /usr/include/c++/4.8/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 ^ user.cpp:18:13: warning: unused variable ‘j’ [-Wunused-variable] int n,i,j; ^ user.cpp:16:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paranteze2.in","r",stdin); ^ user.cpp:17:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paranteze2.out","w",stdout); ^ user.cpp:19:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result]