Compilare: main.c: In function 'main': main.c:6:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("invazie.in","r",stdin),freopen("invazie.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("invazie.in","r",stdin),freopen("invazie.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:68: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("invazie.in","r",stdin),freopen("invazie.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~ main.c:11:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&k,&p,&n),a=k+p,b=k-p; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~