Compilare: user.c: In function ‘main’: user.c:25:2: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fout, "%ld\n", res); ^ user.c:19:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld %lld\n", &n, &p); ^