Compilare: main.cpp: In function 'int main()': main.cpp:36:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i = 0; i < dif.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:37:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int j = i + 1; j < dif.size(); j++) | ~~^~~~~~~~~~~~