Compilare: user.c: In function ‘main’: user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("popularitate.in","r",stdin),freopen("popularitate.out","w",stdout),scanf("%d%d",&k,&m); ^ user.c:4:49: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("popularitate.in","r",stdin),freopen("popularitate.out","w",stdout),scanf("%d%d",&k,&m); ^ user.c:4:86: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("popularitate.in","r",stdin),freopen("popularitate.out","w",stdout),scanf("%d%d",&k,&m); ^ user.c:13:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:17:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&r); ^