[HackerEarth] Dr. Wells decided to speed up flash. He gave flash N powers to chose from. But flash knows he requires exactly M powers. Each power i has got an intensity level Ai associated with it. T - 题解

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题号 P19546
标题 [HackerEarth] Dr. Wells decided to speed up flash. He gave flash N powers to chose from. But flash knows he requires exactly M powers. Each power i has got an intensity level Ai associated with it. T
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