2185. Counting Words With a Given Prefix
Just practice writing Trie.
Tag: Easy
3402. Minimum Operations to Make Columns Strictly Increasing
Easy makes me happy.
1427. Perform String Shifts
Don’t forget mod when dealing with shifting. A negative number a: a % b = (a + b) % b Anyway, easy makes me…
3407. Substring Matching Pattern
This easy is easier than yesterday’s easy. New tech: str.find(sub) / str.rfind(sub). find the first/last index of sub. if sub == “”, return 0/n;…
3411. Maximum Subarray With Equal Products
You are given an array of positive integers nums. An array arr is called product equivalent if prod(arr) == lcm(arr) * gcd(arr), where: prod(arr)…