Compilare: main.c: In function 'main': main.c:17:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("functii.in","r",stdin),freopen("functii.out","w",stdout),scanf("%d%d",&n,&s),r=(P(2,s)+N-2)%N,c=1; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:17:37: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("functii.in","r",stdin),freopen("functii.out","w",stdout),scanf("%d%d",&n,&s),r=(P(2,s)+N-2)%N,c=1; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:17:71: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("functii.in","r",stdin),freopen("functii.out","w",stdout),scanf("%d%d",&n,&s),r=(P(2,s)+N-2)%N,c=1; ^~~~~~~~~~~~~~~~~~~