1437
CF1437F
好神奇的 dp 题。 description 给定数组 \(a\),求其有多少个排列满足 \(y_i=\max(a_1,a_2,\dots,a_{i-1})\) \(\forall i\in [1,n]\cap\mathbb{Z},2a_i\leq y_i ~\texttt{OR}~ 2y_i\le ......
leetcode-1437-easy
Check If All 1's Are at Least Length K Places Away Given an binary array nums and an integer k, return true if all 1's are at least k places away from ......