Compilare: main.c: In function 'main': main.c:56:18: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=] fprintf(fout,"%d\n",sum); ^ main.c:32:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&n,&l,&u); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:34:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^~~~~~~~~~~~~~~~~~~