摘要： B. Unlucky TicketEach of you probably has your personal experience of riding public transportation and buying tickets. After a person buys a ticket (which traditionally has anevennumber of digits), he usually checks whether the ticket is lucky. Let us remind you that a ticket is lucky if the sum of 阅读全文

摘要： A. TwinsImagine that you have a twin brother or sister. Having another person that looks exactly like you seems very unusual. It's hard to say if having something of an alter ego is good or bad. And if you do have a twin, then you very well know what it's like.Now let's imagine a typical 阅读全文

摘要： Stockbroker GrapevineTime Limit:1000MSMemory Limit:10000KTotal Submissions:19042Accepted:10287DescriptionStockbrokers are known to overreact to rumours. You have been contracted to develop a method of spreading disinformation amongst the stockbrokers to give your employer the tactical edge in the st 阅读全文

摘要： The Cow LexiconTime Limit:2000MSMemory Limit:65536KTotal Submissions:5719Accepted:2638DescriptionFew know that the cows have their own dictionary withW(1 ≤W≤ 600) words, each containing no more 25 of the characters 'a'..'z'. Their cowmunication system, based on mooing, is not very ac 阅读全文

摘要： FroggerTime Limit:1000MSMemory Limit:65536KTotal Submissions:15491Accepted:5124DescriptionFreddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans to visit her, but since the water is dirty and full of tourists' sunscreen 阅读全文

摘要： El DoradoTime Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 304Accepted Submission(s): 153Problem DescriptionBruce Force has gone to Las Vegas, the El Dorado for gamblers. He is interested especially in one betting game, where a machine forms a seque 阅读全文

摘要： Convert Kilometers to MilesTime Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 394Accepted Submission(s): 276Problem DescriptionThis year, Bruce Force spends his vacation in Flagstaff, Arizona, where he wants to practice for his next half marathon (a 阅读全文

摘要： A Game with MarblesTime Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 611Accepted Submission(s): 339 Problem DescriptionThere are n bowls, numbered from 1 to n. Initially, bowl i contains mimarbles. One game step consists of removing one marble from. 阅读全文

摘要： Alfredo's Pizza RestaurantTime Limit: 1000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 950Accepted Submission(s): 562Problem DescriptionTraditionally after the Local Contest, judges and contestants go to their favourite restaurant, Alfredos Pizza Restauran 阅读全文

摘要： Currency ExchangeTime Limit:1000MSMemory Limit:30000KTotal Submissions:11843Accepted:3984DescriptionSeveral currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations only with these currencies. There can 阅读全文