Compilare: user.cpp: In function ‘int solve(int*, int, int)’: user.cpp:100:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index + bucket[i].size() < k) { ^ user.cpp:104:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j< bucket[i].size() ; ++j) { ^ user.cpp:99:8: warning: unused variable ‘aux’ [-Wunused-variable] int aux = (bucket[i].size()) ; ^ user.cpp:96:7: warning: unused variable ‘ruled_out’ [-Wunused-variable] int ruled_out = 0; ^ user.cpp:45:6: warning: ‘bucket_range’ may be used uninitialized in this function [-Wmaybe-uninitialized] int bucket_range; ^