Compilare: user.cpp: In function ‘std::tuple<int, int, int> getkth(int)’: user.cpp:31:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < arrs.size(); ++i) { ^ user.cpp: In function ‘void rev_range(int, int)’: user.cpp:81:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = by + 1; k < arrs.size(); ++k)new_liste.push_back(arrs[k]); ^ user.cpp: In function ‘void reb()’: user.cpp:94:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < arrs.size(); ++i) { ^