21941_PowerofCryptography

2022-5-16 18:20| 发布者: Hocassian| 查看: 30| 评论: 0|原作者: 肇庆学院ACM合集

摘要:
C:\Users\Administrator\Downloads\2019-10-12-10-14-4-89505979186700-Problem List-采集的数据-后羿采集器.html

Pro.ID

21941

Title

Power of Cryptography

Title链接

http://10.20.2.8/oj/exercise/problem?problem_id=21941

AC

27

Submit

41

Ratio

65.85%

时间&空间限制

  • Time Limit: 2000/1000 MS (Java/Others)     Memory Limit: 65536/32768 K (Java/Others)
  • 描述

    Current work in cryptography involves  (among other  things)  large prime numbers and computing powers of numbers modulo functions of these primes.  Work in this area has resulted in the practical use of results from number theory and other branches of mathematics once considered to be of only theoretical interest.

    This problem involves the efficient computation of integer roots of numbers.

    Given an integer n ≥ 1 and an integer p ≥ 1 you have to write a program that determines the n-th positive root of p. In this problem, given such integers n and p, p will always be of the form k to the n-th power, for an integer k (this integer is what your program must find).

    输入

    The input consists of a sequence of integer pairs n and p with each integer on a line by itself. For all such pairs 1 ≤ n ≤ 200, 1 ≤ p < 10101 and there exists an integer k, 1 ≤ k ≤ 109 such that kn = p.

    输出

    Description

    Current work in cryptography involves  (among other  things)  large prime numbers and computing powers of numbers modulo functions of these primes.  Work in this area has resulted in the practical use of results from number theory and other branches of mathematics once considered to be of only theoretical interest.

    This problem involves the efficient computation of integer roots of numbers.

    Given an integer n ≥ 1 and an integer p ≥ 1 you have to write a program that determines the n-th positive root of p. In this problem, given such integers n and p, p will always be of the form k to the n-th power, for an integer k (this integer is what your program must find).

    Input

    The input consists of a sequence of integer pairs n and p with each integer on a line by itself. For all such pairs 1 ≤ n ≤ 200, 1 ≤ p < 10101 and there exists an integer k, 1 ≤ k ≤ 109 such that kn = p.

    Output

    For each integer pair n and p the value k should be printed, i.e., the number k such that kn = p.

    Sample Input

    2 16
    3 27
    7 4357186184021382204544

    Sample Output

    4
    3
    1234

    Source

    样例输入

    2 16
    3 27
    7 4357186184021382204544

    样例输出

    4
    3
    1234

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