Compilare: main.c: In function 'main': main.c:5:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("maraton.in","r",stdin),freopen("maraton.out","w",stdout),scanf("%d%d",&n,&k),s+=k; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:37: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("maraton.in","r",stdin),freopen("maraton.out","w",stdout),scanf("%d%d",&n,&k),s+=k; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:71: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("maraton.in","r",stdin),freopen("maraton.out","w",stdout),scanf("%d%d",&n,&k),s+=k; ^~~~~~~~~~~~~~~~~~~ main.c:7:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v),t=s%10; ^~~~~~~~~~~~~~