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题目来源：http://codeforces.com/problemset/problem/112/A Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The 阅读全文
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题目来源： http://codeforces.com/problemset/problem/118/A Petya started to attend programming lessons. On the first lesson his task was to write a simple p 阅读全文
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题目来源： http://codeforces.com/problemset/problem/158/A "Contestant who earns a score equal to or greater than the k-th place finisher's score will advan 阅读全文
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题目来源：http://codeforces.com/problemset/problem/231/A One day three best friends Petya, Vasya and Tonya decided to form a team and take part in programm 阅读全文
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题目链接：http://codeforces.com/contest/71/problem/A Sometimes some words like "localization" or "internationalization" are so long that writing them many 阅读全文