Compilare: user.cpp: In function ‘int main()’: user.cpp:192:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ^ user.cpp:210:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size(); j++) ^ user.cpp:185:8: warning: unused variable ‘kp’ [-Wunused-variable] int kp = 0; ^ user.cpp:201:9: warning: unused variable ‘k’ [-Wunused-variable] int k, type; ^