B"Let's define a balanced multiset the following way. Write down the sum of all elements of the multiset in its decimal representation. For each position of that number check if the multiset includes at least one element such that the digit of the element and the digit of the sum at that position are the same. If that holds for every position, then the multiset is balanced. Otherwise it's unbalanced. For example, multiset {20, 300, 10001 } is balanced and multiset {20, 310, 10001 } is unbalanced: The red digits mark the elements and the positions for which these elements have the same digit as the sum. The sum of the first multiset is 10321 , every position has the digit required. The sum of the second multiset is 10331 and the second-to-last digit doesn't appear in any number, thus making the multiset unbalanced. You are given an array a_1, a_2, ... , a_n , consisting of n integers. You are asked to perform some queries on it. The queries can be of two types: Note that the empty multiset is balanced. For each query of the second type print the lowest sum of the unbalanced subset. Print -1 if no unbalanced subset exists. The first line contains two integers n and m ( 1 <= n, m <= 2 cdot 10^5 ) -- the number of elements in the array and the number of queries, respectively. The second line contains n integers a_1, a_2, ... , a_n ( 1 <= a_i < 10^9 ). Each of the following m lines contains a query of one of two types: It is guaranteed that there is at least one query of the second type. For each query of the second type print the lowest sum of the unbalanced subset. Print -1 if no unbalanced subset exists. All the subsets of multiset {20, 300, 10001 } are balanced, thus the answer is -1. The possible unbalanced subsets in the third query are {20, 310 } and {20, 310, 10001 } . The lowest sum one is {20, 310 } . Note that you are asked to choose a subset, no"...