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("amlei.in","r",stdin),freopen("amlei.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("amlei.in","r",stdin),freopen("amlei.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&t,&u),fgets(b,N,stdin),fgets(d,N,stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:36: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&t,&u),fgets(b,N,stdin),fgets(d,N,stdin); ^~~~~~~~~~~~~~~~ main.c:9:53: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&t,&u),fgets(b,N,stdin),fgets(d,N,stdin); ^~~~~~~~~~~~~~~~