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("stramosi.in","r",stdin),freopen("stramosi.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.in","r",stdin),freopen("stramosi.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:70: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.in","r",stdin),freopen("stramosi.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~ main.c:7:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",v+i); ^~~~~~~~~~~~~~~ main.c:13:7: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y), ^~~~~~~~~~~~~~~~~~~ main.c:17:7: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^~~~~~~~~~~~~~~~~~~