Compilare: main.cpp: In function 'void CentroidDecomp::apply(ll)': main.cpp:148:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 148 | for(ll i = 0; i < GrupeFii[u].size(); ++i) len_max += GrupeFii[u][i].size(); | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:173:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 173 | for(ll i = 0; i < GrupeFii[u].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~