Compilare: main.c: In function 'main': main.c:5:5: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:42: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:81: 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); ^~~~~~~~~~~~~~~~~~~ main.c:14:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^~~~~~~~~~~~~~ main.c:18:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&r); ^~~~~~~~~~~~~~