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Description Let S = s1 s2...s2n be a well-formed string of parentheses. S can be encoded in two different ways: q By an integer sequence P = p1 p2...pn where pi is the number of left parentheses bef

Description Your task is to read a picture of a chessboard position and print it in the chess notation. Input The input consists of an ASCII-art picture of a chessboard with chess pieces on positio

Description This problem is a reverse case of the problem 2996. You are given the output of the problem H and your task is to find the corresponding input. Input according to output of proble

Description A robot has been programmed to follow the instructions in its path. Instructions for the next direction the robot is to move are laid down in a grid. The possible instructions are

Description In a modernized warehouse, robots are used to fetch the goods. Careful planning is needed to ensure that the robots reach their destinations without crashing into each other. Of course, a

哈哈，还得靠惊人的记忆力啊 Problem Description MZL define F(X) as the first ionization energy of the chemical element X Now he get two chemical elements U,V,given as their atomic number,he w

People CountingTime Limit: 2 Seconds Memory Limit: 65536 KB In a BG (dinner gathering) for ZJU ICPC team, the coaches wanted to count the number of people present at the BG. They did that by havi