Compilare: user.c: In function ‘main’: user.c:36:15: warning: unused variable ‘j’ [-Wunused-variable] int i, n, j; ^ user.c:37:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.in", "r", stdin); ^ user.c:38:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.out", "w", stdout); ^ user.c:39:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.c:40:23: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] FOR(i, 1, n) scanf("%d", s+i); ^