Compilare: user.c: In function ‘main’: user.c:51:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("monezi.in", "r", stdin); ^ user.c:52:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("monezi.out", "w", stdout); ^ user.c:53:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &s); ^ user.c:55:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.c: In function ‘solve’: user.c:27:30: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] int aux = i, pos, cnt = 0, nr; ^ user.c:37:20: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] int prev = i - (1<<pos); ^