Validar RUT!
Java

Enviado por Luis Dujovne

class v{ public static void main(String args[]){int M=0,S=1,T=
Integer.parseInt(args[0]);for(;T!=0;T/=10)S=(S+T%10*(9-M++%6))%11;
System.out.println((char)(S!=0?S+47:75));}}