geppoz-it

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/

var n = parseInt(readline());
var map=[];
for (var i = 0; i < n; i++) {
    map[i]=readline().split("");
    printErr("in:"+map[i]);

geppoz-it

Proprietà XOR:

    a x a.b    =     a.B
    a x A.b    =  A.B x 1
  a.b x a.B    =      a
  a.B x A.b    =    a x b
  a.b x a.B.c  =    a x a.B.C
a.b.c x a.B.C  =  a.b x a.C

Proprietà distributiva AND su XOR: