A Subway for Boroughgraph

Problem Number: 
12 941
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 129 (12,900-12,999)
Input: 
0
0
0
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8…
Problem Analysis Link: 
Flag: 
0
Restrict Problem Hints: 
0
Restrict Problem Inputs: 
0
Problem Id: 
12941