Compilare: user.cpp: In function ‘int get_index_min(int)’: user.cpp:58:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (truncsize < v.size() && ^ user.cpp:61:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp:66:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp:71:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (truncsize < v.size() && ^ user.cpp:74:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:90:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; (1 << i) < s.length(); ++i) ^