Compilare: user.c: In function ‘cobor’: user.c:22:27: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] int best, last = x - 1, aux; ^ user.c: In function ‘main’: user.c:70:3: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(out, "%d", cost); ^ user.c:45:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:47:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &t[i], &p[i]); ^