Compilare: user.cpp: In function ‘int main()’: user.cpp:59:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0 ; j < P[want].size() ; ++j) ^ user.cpp:58:29: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int minlen = 0, p; ^