It was OA with only 1 question in coding round :
https://leetcode.com/problems/burst-balloons/description/
Question wasn't as it is.. it was slightly modified as,
we need to find burst score such that, if on bursting i'th balloon,
score += (i-1)th * (i+1)th values

Those who passed all 50 testcases were shortlisted for the following subsequent rounds.