Compilare: main.cpp: In function 'bool bfs(int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&)': main.cpp:11:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(int i = 1; i < tata.size(); i++){ | ~~^~~~~~~~~~~~~ main.cpp:27:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i = 0; i < muchii[x].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~