Eroare de compilare: user.cpp: In function ‘void solve(int)’: user.cpp:71:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = graf[nod][0]; i<graf[nod].size(); ++i) ^ user.cpp:96:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == graf[nod].size()) ^ user.cpp: In function ‘int main()’: user.cpp:181:31: error: no matching function for call to ‘begin(int&)’ for (auto x:unde_bag[i]) ^ user.cpp:181:31: note: candidates are: 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:1193:5: note: template argument deduction/substitution failed: user.cpp:181:31: note: mismatched types ‘const std::valarray<_Tp>’ and ‘int’ for (auto x:unde_bag[i]) ^ 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:1183:5: note: template<class _Tp> _Tp* std::begin(std::valarray<_Tp>&) begin(valarray<_Tp>& __va) ^ /usr/include/c++/4.8/valarray:1183:5: note: template argument deduction/substitution failed: user.cpp:181:31: note: mismatched types ‘std::valarray<_Tp>’ and ‘int’ for (auto x:unde_bag[i]) ^ 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 ^ /usr/include/c++/4.8/initializer_list:89:5: note: template argument deduction/substitution failed: user.cpp:181:31: note: mismatched types ‘std::initializer_list<_Tp>’ and ‘int’ for (auto x:unde_bag[i]) ^ In file included from /usr/include/c++/4.8/string:51:0, from /usr/include/c++/4.8/bits/locale_classes.h:40,