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Counting

LeetCode 1155: Number of Dice Rolls With Target Sum
·3 mins
LeetCode Medium Dynamic-Programming Counting
LeetCode note for Number of Dice Rolls With Target Sum, rebuilt from the original learning note
LeetCode 1497: Check If Array Pairs Are Divisible by k (Remainder Pairing, Modulo)
·2 mins
LeetCode Daily Medium Array Hash-Map Complement Counting Math Modulo
Remainder pairing with a hash map; handle 0 and k/2 remainders carefully.