D. Valera and Swaps time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A permutation p of length n is a sequence of distinc
Description You are given a 0-indexed string s of even length n. The string consists of exactly n / 2 opening brackets ‘[’ and n / 2 closing brackets ‘]’. A string is called balanced if and only if:
You are given a permutation of the numbers 1, 2, ..., n and m pairs of positions (aj, bj). At each step you can choose a pair from the given positions and swap the numbers in that positions. What
题目链接:https://codeforc.es/contest/1455/problem/D You are given a sequence a consisting of n integers a1,a2,…,an, and an integer x. Your task is to make the sequence a sorted (it is considered sorted i