摘要: Problem Link: Multiple of 2019 Key idea: For subarray S[i1, j] and S[i2, j] with i1 < i2, if the V[i1, j] % 2019 is the same with V[i2, k] % 2019, it 阅读全文
posted @ 2020-05-13 05:18 Review->Improve 阅读(199) 评论(0) 推荐(0) 编辑