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Problem DescriptionNowadays we use content of PM2.5 to discribe the quality of air. The lower content of PM2.5 one city have, the better quality of ai... 阅读全文
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There arenImperial stormtroopers on the field. The battle field is a plane with Cartesian coordinate system. Each stormtrooper is associated with his ... 阅读全文
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Drazil is playing a math game with Varda.Let's definefor positive integerxas a product of factorials of its digits. For example,.First, they choose a ... 阅读全文
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Drazil has many friends. Some of them are happy and some of them are unhappy. Drazil wants to make all his friends become happy. So he invented the fo... 阅读全文
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Someday, Drazil wanted to go on date with Varda. Drazil and Varda live on Cartesian plane. Drazil's home is located in point(0, 0)and Varda's home is ... 阅读全文
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Anya has bought a new smartphone that usesBerdroidoperating system. The smartphone menu has exactlynapplications, each application has its own icon. T... 阅读全文
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Little Tanya decided to present her dad a postcard on his Birthday. She has already created a message — stringsof lengthn, consisting of uppercase and... 阅读全文
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Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on time and passes... 阅读全文
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A and B are preparing themselves for programming contests.An important part of preparing for a competition is sharing programming knowledge from the e... 阅读全文
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A and B are preparing themselves for programming contests.B loves to debug his code. But before he runs the solution and starts debugging, he has to f... 阅读全文
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A and B are preparing themselves for programming contests.To train their logical thinking and solve problems better, A and B decided to play chess. Du... 阅读全文
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Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing some positive integer. A... 阅读全文
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A word or a sentence in some language is called apangramif all the characters of the alphabet of this language appear in itat least once. Pangrams are... 阅读全文
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#include#includeusing namespace std;int main(){ long long begin,end,mid,k; long long n,m; begin = 1;end = 100000000; scanf("%d%d",&n,&m)... 阅读全文
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Ford Prefect got a job as a web developer for a small company that makes towels. His current work task is to create a search engine for the website of... 阅读全文