Compilare: user.cpp: In function ‘LLU CalcVal(LLU&, LLU&, int, LLU&)’: user.cpp:45:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void Solve()’: user.cpp:128:9: warning: unused variable ‘index’ [-Wunused-variable] int index; ^ user.cpp: In function ‘void Read()’: user.cpp:39:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d %d %d", &n, &a1, &b1, &p, &q); ^