Compilare: main.c: In function 'main': main.c:9:21: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(m<=1LL<<n-p) ~^~ main.c:12:23: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] m-=1LL<<n-p; ~^~ main.c:6:5: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:36: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:69: 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); ^~~~~~~~~~~~~~~~~~~~~