Im getting 3/6 test cases correct for this code that I have shared. Please tell me my mistakes(2 TLE and 1 Wrong Answer)

#1

Im getting 3/6 test cases correct for this code that I have shared. Please tell me my mistakes(2 TLE and 1 Wrong Answer).

#2

your approach isnt efficient .
see this

#3

I didn’t get the statement at line number 30 means what it is doing??