Compilare: main.c: In function 'main': main.c:5:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("energii.in","r",stdin),freopen("energii.out","w",stdout),scanf("%hd%hd",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("energii.in","r",stdin),freopen("energii.out","w",stdout),scanf("%hd%hd",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:68: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("energii.in","r",stdin),freopen("energii.out","w",stdout),scanf("%hd%hd",&n,&m); ^~~~~~~~~~~~~~~~~~~~~ main.c:7:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd",&e,&c); ^~~~~~~~~~~~~~~~~~~~~