Compilare: user.cpp: In function ‘void citire()’: user.cpp:62:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {f>>v[j];aa[v[j]]=1;if(v[j]>vm) vm=v[j];} ^ user.cpp: In function ‘void solve()’: user.cpp:67:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=vm;++i) ^ user.cpp:71:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p=i;p<=vm && ns<2;p+=i) ^ user.cpp: In member function ‘void citire::advance()’: user.cpp:41:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^ user.cpp: In constructor ‘citire::citire(const char*)’: user.cpp:15:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^