Compilare: main.cpp: In function 'void bfsx(int)': main.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int j=0;j<G[u].size();++j){ | ~^~~~~~~~~~~~ main.cpp: In function 'void bfsy(int)': main.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int j=0;j<G[u].size();++j){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~