Compilare: user.cpp: In function ‘int main()’: user.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); ++i) { ^ user.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp:67:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((fata == 0 and spate == q.size() - 1) or (fata > 0 and spate < q.size() - 1 and q[fata - 1] == q[spate + 1])) { ^ user.cpp:67:82: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((fata == 0 and spate == q.size() - 1) or (fata > 0 and spate < q.size() - 1 and q[fata - 1] == q[spate + 1])) { ^