NIRVANA REBIRTH

题目传送门Anu has created her own function f: f(x,y)=(x|y)−y where | denotes the bitwise OR operation. For example, f(11,6)=(11|6)−6=15−6=9. It can be proved that for any nonnegative numbers x and y valu...

题目传送门Reminder: the median of the array [a1,a2,…,a2k+1][a1,a2,…,a_{2k+1}][a1,a2,…,a2k+1​] of odd number of elements is defined as follows: let [b1,b2,…,b2k+1][b1,b2,…,b2_{k+1}][b1,b2,…,b2k+1​] be the...

题目传送门Guy-Manuel and Thomas have an array a of n integers [a1,a2,…,an]. In one step they can add 1 to any element of the array. Formally, in one step they can choose any integer index i (1≤i≤n) and d...

题目传送门You are given two strings s and t consisting of lowercase Latin letters. Also you have a string z which is initially empty. You want string z to be equal to string t. You can perform the follow...

题目传送门You are given string s of length n consisting of 0-s and 1-s. You build an infinite string t as a concatenation of an infinite number of strings s, or t=ssss… For example, if s=10010s= 10010s=1...

题目传送门You have a large electronic screen which can display up to 998244353 decimal digits. The digits are displayed in the same way as on different electronic alarm clocks: each place for a digit con...

题目传送门With a new body, our idol Aroma White (or should we call her Kaori Minamiya?) begins to uncover her lost past through the OS space.The space can be considered a 2D plane, with an infinite numb...

题目传送门NEKO#ΦωΦ has just got a new maze game on her PC!The game’s main puzzle is a maze, in the forms of a 2×n rectangle grid. NEKO’s task is to lead a Nekomimi girl from cell (1,1) to the gate at (2...

题目传送门Our dear Cafe’s owner, JOE Miller, will soon take part in a new game TV-show “1 vs. n”!The game goes in rounds, where in each round the host asks JOE and his opponents a common question. All p...

题目传送门A.R.C. Markland-N is a tall building with n floors numbered from 1 to n. Between each two adjacent floors in the building, there is a staircase connecting them.It’s lunchtime for our sensei Co...

题目传送门DescriptionOnce Petya read a problem about a bracket sequence. He gave it much thought but didn’t find a solution. Today you will face it.You are given string s. It represents a correct brack...

题目传送门Summer is coming! It’s time for Iahub and Iahubina to work out, as they both want to look hot at the beach. The gym where they go is a matrix a with n lines and m columns. Let number a[i][j] rep...