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F. All Possible Digits time limit per test 3 seconds memory limit per test 256 megabytes input stand

You are given a tree consisting of $$$n$$$ vertices and $$$n - 1$$$ edges, and each vertex $$$v$$$ h

题目 In this problem, unlike problem A, you need to look for unluckiest number, not the luckiest one.

题目 A subsequence of a is an array we can get by erasing some elements of a. It is allowed to erase z

题目 Consider the decimal presentation of an integer. Let's call a number d-magic if digit d appears i

You are given array a with n integers and m queries. The i-th query is given with three integers li,

题目 Problem - F - Codeforces F. Xors on Segments You are given an array with n integers a_i and m que

题目 The New Year holidays are over, but Resha doesn't want to throw away the New Year tree. He invite

题目 Professor GukiZ has two arrays of integers, a and b. Professor wants to make the sum of the eleme