Compilare: user.c: In function ‘main’: user.c:8:21: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(m<=1LL<<n-p) ^ user.c:11:23: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] m-=1LL<<n-p; ^ user.c:5:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("subset.in","r",stdin),freopen("subset.out","w",stdout),scanf("%d%lld",&n,&m); ^ user.c:5:43: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("subset.in","r",stdin),freopen("subset.out","w",stdout),scanf("%d%lld",&n,&m); ^ user.c:5:74: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("subset.in","r",stdin),freopen("subset.out","w",stdout),scanf("%d%lld",&n,&m); ^