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("sarpe.in","r",stdin),freopen("sarpe.out","w",stdout),fgets(s,1001,stdin),v[0]=strlen(s)-1,z[0]=1,z[1]=4; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:35: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe.in","r",stdin),freopen("sarpe.out","w",stdout),fgets(s,1001,stdin),v[0]=strlen(s)-1,z[0]=1,z[1]=4; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:67: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe.in","r",stdin),freopen("sarpe.out","w",stdout),fgets(s,1001,stdin),v[0]=strlen(s)-1,z[0]=1,z[1]=4; ^~~~~~~~~~~~~~~~~~~