Compilare: user.c: In function ‘main’: user.c:24:14: warning: unused variable ‘index2’ [-Wunused-variable] int index1, index2; ^ user.c:24:6: warning: unused variable ‘index1’ [-Wunused-variable] int index1, index2; ^ user.c:17:8: warning: unused variable ‘f_out’ [-Wunused-variable] FILE *f_out = freopen("cmlsc.out", "wt", stdout); ^ user.c:16:8: warning: unused variable ‘f_in’ [-Wunused-variable] FILE *f_in = freopen("cmlsc.in", "rt", stdin); ^ user.c:20:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &m, &n); ^ user.c:29:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.c:32:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b[i]); ^