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Aaah! Aaah! Aaah! Photo by Unknown Jon Marius shouted too much at the recent Justin Bieber concert, and now needs to go to the doctor because of his s 阅读全文
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Fenwick Tree Fenwick Tree Fenwick Tree Input The first line of input contains two integers NN, QQ, where 1≤N≤50000001≤N≤5000000 is the length of the a 阅读全文
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Biased Standings Biased Standings Biased Standings Usually, results of competitions are based on the scores of participants. However, we are planning 阅读全文
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Bus Numbers Bus Numbers Bus Numbers Your favourite public transport company LS (we cannot use their real name here, so we permuted the letters) wants 阅读全文
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Peragrams Peragrams Peragrams Photo by Ross Beresford Per recently learned about palindromes. Now he wants to tell us about it and also has more aweso 阅读全文