Compilare: main.cpp: In function 'int bfs(int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<int>&)': main.cpp:9:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 9 | for(int i = 0; i < tata.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:20:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 0; i < muchii[x].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for(int j = 0; j < linie.size(); j++) | ~~^~~~~~~~~~~~~~ main.cpp:79:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i = 0; i < muchii[t].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:48:9: warning: unused variable 's' [-Wunused-variable] 48 | int s = 0, t = n+m+1; | ^