Compilare: main.cpp: In function 'void bfs(int)': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(i=0;i<a[k].size();++i) | ~^~~~~~~~~~~~ main.cpp: In function 'void mutari(int)': main.cpp:30:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(i=0;i<gr[k].size();++i){ | ~^~~~~~~~~~~~~ main.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(j=0;j<a[p].size() && q==0;++j) | ~^~~~~~~~~~~~