Compilare: user.cpp: In function ‘bool check(int)’: user.cpp:28:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (R>psum.size()) lim=psum.size(); ^ user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int i=0;i<lim;i++) finalsum+=psum[i]; ^ user.cpp:9:9: warning: unused variable ‘av’ [-Wunused-variable] int av=R;int k=-1; ^