Compilare: main.cpp: In function 'void sortare()': main.cpp:72:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (int i = 0; i < sol.size(); i++) | ~~^~~~~~~~~~~~ main.cpp: In function 'void print()': main.cpp:80:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | for (int i = 0; i < sol.size(); i++,cout << '\n') | ~~^~~~~~~~~~~~ main.cpp:83:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (int j = 0; j < sol[i].size(); j++) | ~~^~~~~~~~~~~~~~~