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A. From Hero to Zero 题目链接：http://codeforces.com/contest/1175/problem/A 题目 ou are given an integer n and an integer kIn one step you can do one of the 阅读全文
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C. Ehab and a Special Coloring Problem 题目链接：http://codeforces.com/contest/1174/problem/C 题目 You're given an integer n. For every integer i from 2 to n 阅读全文
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B.Ehab Is an Odd Person 题目链接：http://codeforces.com/contest/1174/problem/B 题目 You’re given an array a of length n. You can perform the following operat 阅读全文
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A. Ehab Fails to Be Thanos 题目链接：http://codeforces.com/contest/1174/problem/A 题目 You’re given an array a of length 2n. Is it possible to reorder it in 阅读全文