Compilare: main.cpp: In function 'int main()': main.cpp:57:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i1 = 0; i1 < aux.size() && ok; i1++) | ~~~^~~~~~~~~~~~ main.cpp:58:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (int i2 = i1 + 1; i2 < aux.size(); i2++) { | ~~~^~~~~~~~~~~~