The ? 1 ? 2 ? ... ? n = k problem

Problem Number: 
10 025
Type of Problem: 
Problem Category: 
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
11 1000000000 -1000000000 999999999 -999999999 9999999 -999999 0 1 -1 2 -2
Problem Id: 
10025