Compilare: user.cpp: In function ‘void greedy()’: user.cpp:68:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘int main()’: user.cpp:175:33: warning: spurious trailing ‘%’ in format [-Wformat=] fprintf(fout,"%d%",ls->y); ^ user.cpp:96:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&na,&nb,&m); ^ user.cpp:102:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^