Compilare: main.cpp: In function 'std::unique_ptr<std::vector<int> > bellmanFord(const std::vector<std::vector<std::pair<int, int> > >&)': main.cpp:46:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 0; i<adj.size(); i++) { | ~^~~~~~~~~~~ main.cpp:47:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(int a = 0; a<adj.size(); a++) { | ~^~~~~~~~~~~ main.cpp:52:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | if(a == adj.size()) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:15: warning: unused variable 's' [-Wunused-variable] 62 | int n, m, s; | ^