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E. Dasha and Puzzle 题目连接： http://codeforces.com/contest/761/problem/E Description Dasha decided to have a rest after solving the problem. She had been 阅读全文
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D. Dasha and Very Difficult Problem 题目连接： http://codeforces.com/contest/761/problem/D Description Dasha logged into the system and began to solve prob 阅读全文
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C. Dasha and Password 题目连接： http://codeforces.com/contest/761/problem/C Description After overcoming the stairs Dasha came to classes. She needed to w 阅读全文
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B. Dasha and friends 题目连接： http://codeforces.com/contest/761/problem/B Description Running with barriers on the circle track is very popular in the co 阅读全文
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A. Dasha and Stairs 题目连接： http://codeforces.com/contest/761/problem/A Description On her way to programming school tiger Dasha faced her first test — 阅读全文