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("pali.in","r",stdin),freopen("pali.out","w",stdout),fgets(s,5005,stdin),n=strlen(s)-1; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("pali.in","r",stdin),freopen("pali.out","w",stdout),fgets(s,5005,stdin),n=strlen(s)-1; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:65: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] freopen("pali.in","r",stdin),freopen("pali.out","w",stdout),fgets(s,5005,stdin),n=strlen(s)-1; ^~~~~~~~~~~~~~~~~~~