Compilare: main.c: In function 'A': main.c:8:9: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] fread(p,1,4096,stdin),l=0; ^~~~~~~~~~~~~~~~~~~~~ main.c: In function 'main': main.c:49:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("flori.in","r",stdin),freopen("flori.out","w",stdout),n=R(),k=R(); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:49:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("flori.in","r",stdin),freopen("flori.out","w",stdout),n=R(),k=R(); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~