Hank Schrader and Steven Gomez are DEA officers who are in the quest for catching the drug lord, Heisenberg, who is actually Hank's brother-in-law Walter White!
To complete this mission, they are loading crates containing ammunition inside a truck. The N crates are of different weights, and are numbered from 1,2,3...N.
The weights are represented as W1,W1....WN
While loading the crates, they want the absolute value of the difference between the weights of Pth and Qth crate
INPUT
OUTPUT
CONSTRAINTS