Compilare: main.c: In function 'main': main.c:19:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:20:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:24:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~ main.c:27:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%ld ",&a[i]); ^~~~~~~~~~~~~~~~~~~ main.c:49:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&x,&y); ^~~~~~~~~~~~~~~~~~~~~~