Design UDP:

A Key (integer), value (string) pair is given at a time. It only prints value in sequence of ascending order of keys. If the key is not in order, it doesn’t print its string value and only prints the value until it sees the next key in order.

When it goes through all the keys, it prints the remaining values in order if no value in the sequence is missing. Only one pair of key and value is given at a time. There is no list. Could anyone tell me what Leetcode problem is this? Thank you.

Example:

1. 1, "A"
2. 2, "B"
3. 3, "C"
4. 7, "G"
5. 4, "D"
6. 6, "F"
7. 5, "E"

It prints:
A
B
C
Doesn't print anything for 7
D
Doesn't print anything for 6
E
F
G

The interview was last month (October 2021).