Why test cases 3 and 5 are failing in MILITARY TIME code coach problem?

Question

I have done all I could with it, I also searched Google , the logic of the code is same on there as well ,that you have to take care of the 12s in AM and PM but still the test cases 3 and 5 are failing.
Below is my code

lst=input().split()
new_lst=lst[0].split(':')
if lst[1].lower()=='am':
if new_lst[0]!='12':
print(lst[0])
else:
new_lst[0]='00'
print(':'.join(new_lst))
else:
if new_lst[0]!='12':
new_lst[0]=str(int(new_lst[0])+12)
print(':'.join(new_lst))
else:
print(lst[0])

Answer 1

I fixed the error in my code Aryan Prakash noticed.
https://code.sololearn.com/cTjMmDD1Ox1d

Answer 2

Your approach works but if you use string formatting to add the leading zero(s) you need fewer lines.
t = input().split()
hm = t[0].split(":")
h = int(hm[0])
if t[1] == "PM":
h = 12 if h == 12 else h + 12
else:
h = 0 if h == 12 else h
print(f"{h:0>2}:{hm[1]}") # 0>2 pads to 2 digits with zeros

https://code.sololearn.com/cTjMmDD1Ox1d/?ref=app

Answer 3

Aryan Prakash for input
4:30 AM
expected output should be 04:30 ✅
But your code outputs 4:30 ❌

This is what Ayush Rastogi is saying and you have still not corrected it in your code

https://code.sololearn.com/ck1Oagll59GJ/?ref=app

Answer 4

Thanks Aryan Prakash good catch! I'll work on it.

Answer 5

David
The string formatting approach is really nice.
But it would return 24:49 and 12:31 for 12:49 PM and 12:31 AM

Answer 6

The most common error that happens is that when we print any hour less than 10 for am, we ignore the 0 before it.

The program will print 1:45, if 1:45 AM is given as input when it should print 01:45.

Just add 0 before every hour less than 10 for AM. It will get right. I think you will have to change the format of your program too to fit the change in.

Answer 7

Thanks Arsenic and Ayush
Now, I understand it

Answer 8

Ayush
I have done that (you can see that in the code part) but still it happens