Compilare: main.cpp: In function 'void bfs(int)': main.cpp:37:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i = 0; i < graph[node].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void get_result(int, std::set<int>&)': main.cpp:66:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(int i = 0; i < parent[it].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:108:21: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wformat=] 108 | fprintf(fout, "%d\n", solution.size()); | ~^ ~~~~~~~~~~~~~~~ | | | | int std::set<int>::size_type {aka long unsigned int} | %ld