Leetcode 3016. Minimum Number of Pushes to Type Word II

Assign each distinct letter in the word to a press-count position (typing a letter costs its position index on the key) subject to at most 8 letters per position (one per key 2–9) to minimize the total weighted sum of frequencies × positions. This is a capacity-constrained assignment solved by sorting letter frequencies and greedily giving the highest frequencies the smallest available positions.