Eroare de compilare: main.cpp: In member function 'void Graph::BFS(int)': main.cpp:124:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for (i = 0; i < a[k].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In member function 'void Graph::DFS(int)': main.cpp:155:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 155 | for (i = 0; i < a[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In member function 'void Graph::DFS_T(int, int)': main.cpp:179:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 179 | for (i = 0; i < a_t[x].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In member function 'void Graph::Kruskal()': main.cpp:261:2: error: 'sort' was not declared in this scope; did you mean 'qsort'? 261 | sort(a_cost.begin(), a_cost.end(), criteriu_sortare); | ^~~~ | qsort Non zero exit status: 1