Compilare: main.c: In function 'main': main.c:6:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("farfurii.in","r",stdin),freopen("farfurii.out","w",stdout),scanf("%d%lld",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("farfurii.in","r",stdin),freopen("farfurii.out","w",stdout),scanf("%d%lld",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:70: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("farfurii.in","r",stdin),freopen("farfurii.out","w",stdout),scanf("%d%lld",&n,&k); ^~~~~~~~~~~~~~~~~~~~~