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("calatorie.in","r",stdin),freopen("calatorie.out","w",stdout),scanf("%lld",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:36: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("calatorie.in","r",stdin),freopen("calatorie.out","w",stdout),scanf("%lld",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:72: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("calatorie.in","r",stdin),freopen("calatorie.out","w",stdout),scanf("%lld",&t); ^~~~~~~~~~~~~~~~ main.c:7:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n),s=0; ^~~~~~~~~~~~~~~~ main.c:9:10: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",c+i,b+i),s+=b[i]; ^~~~~~~~~~~~~~~~~~~~~~~~~