Compilare: user.cpp: In function ‘int Solve(int)’: user.cpp:21:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( Hash.size() > x ){ ^ user.cpp: In function ‘int main()’: user.cpp:36:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d%d%d", &N, &L, &U ); ^ user.cpp:39:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( f, "%d", &v[i] ); ^