Q1. Given a 2d matrix matrix, find if you can reach from 0,0 to m-1,n-1 cell in given time T or not. The grid has some cells blocked, can only move in 4 directions, top/bottom/left/right.

Q2. https://leetcode.com/problems/count-subarrays-with-fixed-bounds/description/

Design Round 1:

LRU Cache

Design Round 2:

Build a travel booking site like MMT/ClearTrip.