Compilare: main.c: In function 'main': main.c:7:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin),freopen("next.out","w",stdout),fgets(s,1000005,stdin),scanf("%lld",&d); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin),freopen("next.out","w",stdout),fgets(s,1000005,stdin),scanf("%lld",&d); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:65: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin),freopen("next.out","w",stdout),fgets(s,1000005,stdin),scanf("%lld",&d); ^~~~~~~~~~~~~~~~~~~~~~ main.c:7:88: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin),freopen("next.out","w",stdout),fgets(s,1000005,stdin),scanf("%lld",&d); ^~~~~~~~~~~~~~~~