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描述 现在有"abcdefghijkl”12个字符,将其所有的排列中按字典序排列,给出任意一种排列,说出这个排列在所有的排列中是第几小的? 输入 第一行有一个整数n(0<n<=10000);随后有n行,每行是一个排列; 输出 输出一个整数m,占一行,m表示排列是第几位; 样例输入 样例输出 解题思路 阅读全文
摘要:
描述 现在有"abcdefghijkl”12个字符,将其按字典序排列,如果给出任意一种排列,我们能说出这个排列在所有的排列中是第几小的。但是现在我们给出它是第几小,需要你求出它所代表的序列. 输入 第一行有一个整数n(0<n<=10000);随后有n行,每行是一个整数m,它代表着序列的第几小; 输出 阅读全文
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Description The branch of mathematics called number theory is about properties of numbers. One of the areas that has captured the interest of number t 阅读全文
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Problem Description A positive proper divisor is a positive divisor of a number n, excluding n itself. For example, 1, 2, and 3 are positive proper di 阅读全文
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Description Write a program which reads an integer n and prints the number of prime numbers which are less than or equal to n. A prime number is a nat 阅读全文