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("xspe.in","r",stdin),freopen("xspe.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:31: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.in","r",stdin),freopen("xspe.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:62: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.in","r",stdin),freopen("xspe.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~ main.c:7:8: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",A+i); ^~~~~~~~~~~~~~~