Prime Number Definition An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. For instance, ...
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其他好文 时间：
2018-03-20 22:58:42
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342
Problem Statement You are given an integer N. Find the number of the positive divisors of N!, modulo 109+7. Constraints 1≤N≤103 Input The input is giv ...
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2018-03-12 22:53:14
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210
Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For exa ...
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2018-03-11 17:37:40
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143
Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 1, 2, 3, 4, 5, ...
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2018-03-11 17:27:18
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141
（一） https://stackoverflow.com/questions/4951442/formula-with-dynamic-number-of-variables See ?as.formula, e.g.: where factors is a character vector co ...
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2018-03-07 10:30:33
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228
Among all the factors of a positive integer N, there may exist several consecutive numbers. For example, 630 can be factored as 3 5 6 7, where 5, 6, a ...
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2018-02-06 10:20:10
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188
Given any positive integer N, you are supposed to find all of its prime factors, and write them in the format N = p1^k1 p2^k2 … pm^km. Input Specifica ...
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2018-01-27 13:49:53
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A. Modular Exponentiation The following problem is well-known: given integers n and m, calculate , where 2n?=?2·2·...·2 (n factors), and denotes the r ...
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2018-01-09 12:12:14
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273
Given any positive integer N, you are supposed to find all of its prime factors, and write them in the format N = p1^k1 * p2^k2 *…*pm^km. Input Specif ...
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其他好文 时间：
2018-01-01 16:51:31
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176
Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For exa ...
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其他好文 时间：
2017-12-06 14:35:22
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139
