Eroare de compilare: main.cpp: In function 'int main()': main.cpp:31:15: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<char> >::value_type {aka char}[int]' for array subscript p[n]={s[n][0],s[n][(int)s.length()-1]}; ^ main.cpp:31:39: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<char> >::value_type {aka char}[int]' for array subscript p[n]={s[n][0],s[n][(int)s.length()-1]}; ^ main.cpp:31:40: error: no match for 'operator=' (operand types are 'std::pair<char, char>' and '<brace-enclosed initializer list>') p[n]={s[n][0],s[n][(int)s.length()-1]}; ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:2: /usr/include/c++/6/bits/stl_pair.h:363:7: note: candidate: std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_copy_assignable<_Tp>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__wrap_nonesuch&>::type) [with _T1 = char; _T2 = char; typename std::conditional<std::__and_<std::is_copy_assignable<_Tp>, std::is_copy_assignable<_T2> >::value, const std::pair<_T1, _T2>&, const std::__wrap_nonesuch&>::type = const std::pair<char, char>&] operator=(typename conditional< ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:363:7: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::conditional<true, const std::pair<char, char>&, const std::__wrap_nonesuch&>::type {aka const std::pair<char, char>&}' /usr/include/c++/6/bits/stl_pair.h:380:7: note: candidate: std::pair<_T1, _T2>& std::pair<_T1, _T2>::operator=(typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__wrap_nonesuch&&>::type) [with _T1 = char; _T2 = char; typename std::conditional<std::__and_<std::is_move_assignable<_Tp>, std::is_move_assignable<_T2> >::value, std::pair<_T1, _T2>&&, std::__wrap_nonesuch&&>::type = std::pair<char, char>&&] operator=(typename conditional< ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:380:7: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::conditional<true, std::pair<char, char>&&, std::__wrap_nonesuch&&>::type {aka std::pair<char, char>&&}' /usr/include/c++/6/bits/stl_pair.h:396:2: note: candidate: template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, const _U1&>, std::is_assignable<_T2&, const _U2&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(const std::pair<_U1, _U2>&) [with _U1 = _U1; _U2 = _U2; _T1 = char; _T2 = char] operator=(const pair<_U1, _U2>& __p) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:396:2: note: template argument deduction/substitution failed: main.cpp:31:40: note: couldn't deduce template parameter '_U1' p[n]={s[n][0],s[n][(int)s.length()-1]}; ^ In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:2: /usr/include/c++/6/bits/stl_pair.h:407:2: note: candidate: template<class _U1, class _U2> typename std::enable_if<std::__and_<std::is_assignable<_T1&, _U1&&>, std::is_assignable<_T2&, _U2&&> >::value, std::pair<_T1, _T2>&>::type std::pair<_T1, _T2>::operator=(std::pair<_U1, _U2>&&) [with _U1 = _U1; _U2 = _U2; _T1 = char; _T2 = char] operator=(pair<_U1, _U2>&& __p) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:407:2: note: template argument deduction/substitution failed: main.cpp:31:40: note: couldn't deduce template parameter '_U1' p[n]={s[n][0],s[n][(int)s.length()-1]}; ^ Non zero exit status: 1