Compilare: main.cpp: In function 'void CentroidDecomp::apply(int)': main.cpp:144:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | for(int i = 0; i < GrupeFii[u].size(); ++i) len_max += GrupeFii[u][i].size(); | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:169:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 169 | for(int i = 0; i < GrupeFii[u].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~