Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:26:5: error: reference to ‘begin’ is ambiguous begin=v[1].first; ^ user.cpp:4:17: note: candidates are: int begin int n,a,covered,begin,hmax,sol,last; ^ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:94:0, from user.cpp:1: /usr/include/c++/4.8/valarray:1193:5: note: template<class _Tp> const _Tp* std::begin(const std::valarray<_Tp>&) begin(const valarray<_Tp>& __va) ^ /usr/include/c++/4.8/valarray:1183:5: note: template<class _Tp> _Tp* std::begin(std::valarray<_Tp>&) begin(valarray<_Tp>& __va) ^ In file included from /usr/include/c++/4.8/bits/basic_string.h:42:0, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/sstream:38, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/initializer_list:89:5: note: template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>) begin(initializer_list<_Tp> __ils) noexcept ^ In file included from /usr/include/c++/4.8/string:51:0, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/sstream:38, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/bits/range_access.h:87:5: note: template<class _Tp, unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm]) begin(_Tp (&__arr)[_Nm]) ^ /usr/include/c++/4.8/bits/range_access.h:58:5: note: template<class _Container> decltype (__cont.begin()) std::begin(const _Container&) begin(const _Container& __cont) -> decltype(__cont.begin()) ^ /usr/include/c++/4.8/bits/range_access.h:48:5: note: template<class _Container> decltype (__cont.begin()) std::begin(_Container&) begin(_Container& __cont) -> decltype(__cont.begin()) ^ user.cpp:34:30: error: reference to ‘begin’ is ambiguous if(hmax*(v[j].second-begin)<=a)