#3753
Total Waviness of Numbers in Range II
international master · 2095 · lc hard +32 · 25.4% accepted · 37 likes · top 4%
Description
Given integers num1 and num2, return the total sum of waviness for every number in the inclusive range [num1, num2], where waviness counts interior digits that are either strictly larger than both neighbors (peaks) or strictly smaller than both neighbors (valleys), modulo 109 + 7.
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