DeaL0124

摘要： You are given two binary strings aa and bb of the same length. You can perform the following two operations on the string aa: Swap any two bits at ind 阅读全文

摘要： You're given an integer nn. For every integer ii from 22 to nn, assign a positive integer aiai such that the following conditions hold: For any pair o 阅读全文

摘要： Dreamoon is standing at the position 0 on a number line. Drazil is sending a list of commands through Wi-Fi to Dreamoon's smartphone and Dreamoon foll 阅读全文

摘要： Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions: After the cutting each ribbon 阅读全文

摘要： Vova promised himself that he would never play computer games... But recently Firestorm — a well-known game developing company — published their newes 阅读全文

摘要： The only difference between easy and hard versions is constraints. There are nn kids, each of them is reading a unique book. At the end of any day, th 阅读全文

摘要： Pavel loves grid mazes. A grid maze is an n × m rectangle maze where each cell is either empty, or is a wall. You can go from one cell to another only 阅读全文

摘要： A company has n employees numbered from 1 to n. Each employee either has no immediate manager or exactly one immediate manager, who is another employe 阅读全文

摘要： DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the chessboard are bad, others are goo 阅读全文

摘要： Berland shop sells nn kinds of juices. Each juice has its price cici. Each juice includes some set of vitamins in it. There are three types of vitamin 阅读全文