Eroare de compilare: main.cpp: In function 'void solve2()': main.cpp:92:20: error: 'ultimc' was not declared in this scope s.push({ultiml,ultimc}); ^~~~~~ main.cpp:92:27: error: no matching function for call to 'std::stack<std::pair<int, int> >::push(<brace-enclosed initializer list>)' s.push({ultiml,ultimc}); ^ In file included from /usr/include/c++/6/stack:61:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:89, from main.cpp:1: /usr/include/c++/6/bits/stl_stack.h:218:7: note: candidate: void std::stack<_Tp, _Sequence>::push(const value_type&) [with _Tp = std::pair<int, int>; _Sequence = std::deque<std::pair<int, int>, std::allocator<std::pair<int, int> > >; std::stack<_Tp, _Sequence>::value_type = std::pair<int, int>] push(const value_type& __x) ^~~~ /usr/include/c++/6/bits/stl_stack.h:218:7: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const value_type& {aka const std::pair<int, int>&}' /usr/include/c++/6/bits/stl_stack.h:223:7: note: candidate: void std::stack<_Tp, _Sequence>::push(std::stack<_Tp, _Sequence>::value_type&&) [with _Tp = std::pair<int, int>; _Sequence = std::deque<std::pair<int, int>, std::allocator<std::pair<int, int> > >; std::stack<_Tp, _Sequence>::value_type = std::pair<int, int>] push(value_type&& __x) ^~~~ /usr/include/c++/6/bits/stl_stack.h:223:7: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::stack<std::pair<int, int> >::value_type&& {aka std::pair<int, int>&&}' main.cpp: In function 'int main()': main.cpp:137:49: error: 'ultimc' was not declared in this scope mat[froml][fromc]=-2, ultiml=froml, ultimc=fromc; ^~~~~~ Non zero exit status: 1