Compilare: user.cpp: In function ‘int main()’: user.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < a.size(); i++){ ^ user.cpp:51:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<a.size()-1;i++) ^ user.cpp:60:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<a.size();i++) ^ user.cpp:19:29: warning: ‘maxim’ may be used uninitialized in this function [-Wmaybe-uninitialized] int nr = 0, nrm = 0, i, maxim; ^