Compilare: main.c: In function 'main': main.c:7:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("deque.in","r",stdin),freopen("deque.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("deque.in","r",stdin),freopen("deque.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:67: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("deque.in","r",stdin),freopen("deque.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~ main.c:10:6: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v); ^~~~~~~~~~~~~~ main.c:16:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v); ^~~~~~~~~~~~~~