Compilare: main.cpp: In function 'int main()': main.cpp:34:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 0; i < arr.size() - 1; ++i) { | ~~^~~~~~~~~~~~~~~~ main.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i = 0; i < diff.size(); ++i) { | ~~^~~~~~~~~~~~~