Expression Bracketing

Problem Number: 
10 312
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 103 (10,300-10,399)
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
18 1 2 5 21 7 8 23 9 10 14 3 15 26 22 16 24 12
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=1…
Problem Id: 
10312