Problem 3. Tanks Collector
Здравейте , ще може ли някой да даде рамо за тази задачка дава ми 90/100 и не мога да разбера защо .
https://judge.softuni.bg/Contests/Practice/Index/1862#2
https://pastebin.com/H38B8ezY
On line 50 you check for the new tank on the given index and for being in the list.
if (listTanks.get(indexInsert).equals(tankName) && listTanks.contains(tankName))
so if the list contains the tank on another index you add him again.