Compilare: user.cpp: In function ‘void back(std::vector<int>&, std::vector<int>&, int, int, int, int)’: user.cpp:17:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((next == pos.size()) && (k != n)){ ^ user.cpp: In function ‘void test()’: user.cpp:52:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (index = 0; index < ana.size(); ++index) { ^ user.cpp: In function ‘int compute(int, int)’: user.cpp:114:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < v.size(); j++) { ^ user.cpp:111:6: warning: unused variable ‘count’ [-Wunused-variable] int count = (1<<nr)-1; ^ user.cpp: In function ‘void dynamicProgrammingSlow()’: user.cpp:130:12: warning: unused variable ‘index’ [-Wunused-variable] int i, j, index; ^ user.cpp: In function ‘void dynamicProgramming()’: user.cpp:149:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < v.size(); ++j) { ^ user.cpp: In function ‘int main()’: user.cpp:245:9: warning: unused variable ‘i’ [-Wunused-variable] int t, i; ^