Compilare: main.cpp: In function 'int main()': main.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < grupe.size() - 1; i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int j = i + 1; j < grupe.size(); j++) | ~~^~~~~~~~~~~~~~ main.cpp:42:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (int p = 0; p < grupe.size() && aux != 2; p++) | ~~^~~~~~~~~~~~~~ main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int q = 0; q < grupe[p].size(); q++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:60:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (int u = 0; u < grupe[aux2].size(); u++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:74:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < grupe.size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp:77:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (int j = 0; j < grupe[i].size(); j++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:60:39: warning: 'aux2' may be used uninitialized in this function [-Wmaybe-uninitialized] 60 | for (int u = 0; u < grupe[aux2].size(); u++) | ^