InterviewBit Problems   N digit numbers with digit sum S : Unsolved

About the N digit numbers with digit sum S : Unsolved category (1)
What is the error in this DP C++? (1)
Use matrix for memoization (1)
Help me which case I am missing (2)
Why is this top-down memoization TLEing? (3)
What is OP of (1, 0) (3)
Important hint: check before submitting (1)
Python DP code giving Memory Limit Error (2)
Python top to bottom approach showing memory limit exceeded please reveiw my code (3)
Wrong value in test case (75, 22) (8)
Use lookup table of size 1000x1000 (2)
Error in checker (1)
Initialising dp[i][j] to 0 may cause TLE! (2)
Code running on test case when input custom vise in submission giving wrong answer (3)
Title of your commen (2)
Partial answers for [1000][1000] and complete for [1001][1001] (2)
Please mention in comments that the function params are sum or digit, instead of plain A or B, it gets confusing (1)
Author solution wrong answer (2)
Cannot understand the error (1)
What are the contraints? (1)
TLE even when optimized (1)
Getting wrong answer for test case A : 75 B : 22 (2)
Python : Recursive solution fails due to massive test cases (3)
Doubt for small test cases (2)
Bug in test case (1)
What does segmentation fault in efficiency part mean? (2)
Constraints for this problem (1)