XOR Subset

Problem Number: 
13 028
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 130 (13,000-13,999)
Input: 
0
0
0
Critical Input: 
Random Input: 
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8…
Problem Analysis Link: 
Problem Id: 
13028