HBC244326Portal炫酷反演魔术题解 (中考数学数组实战练习) 给定一个长度为nnn的数组a[1n]a[1cdots n]a[1n],其中1≤ai≤n1le a_ile n1≤ai≤n,求解 ∑i=1n∑j=1nφsum_{i=1}^n sum_{j=1}^n... 算法基础篇 2023-11-10 53 #HBC244326Portal炫酷反演魔术题解