摘要：Count Pairs You are given a prime number pp, nn integers a1,a2,…,ana1,a2,…,an, and an integer kk. Find the number of pairs of indexes (i,j)(i,j) (1≤i< 阅读全文

摘要：You are given an array a1,a2,…,ana1,a2,…,an and an integer kk. You are asked to divide this array into kk non-empty consecutive subarrays. Every eleme 阅读全文

摘要：You are given a function ff written in some basic language. The function accepts an integer value, which is immediately written into some variable xx. 阅读全文

摘要：The only difference between the easy and the hard versions is constraints. A subsequence is a string that can be derived from another string by deleti 阅读全文