题目 A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N…

PAT (Advanced Level) Practice 1015 Reversible Primes (20 分) 凌宸1642 题目描述: A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because…

1015 Reversible Primes (20 分)   A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now give…

A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N (&…

题意: 每次输入两个正整数N,D直到N是负数停止输入(N<1e5,1<D<=10),如果N是一个素数并且将N转化为D进制后逆转再转化为十进制后依然是个素数的话输出Yes,否则输出No. trick: 判断转化后的数是不是1,1不是素数,如果转化后不是1说明转化前也不会是1(第一个测试点错误原因). AAAAAccepted code: #include<bits/stdc++.h> using namespace std; int main(){ int n,d; while…

A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N (&…

1015 Reversible Primes (20)(20 分)提问 A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now…

1015 Reversible Primes(20 分) A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given a…

1015 Reversible Primes (20 分)   A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now give…

题目 A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N…

简单题. #include<iostream> #include<cstring> #include<cmath> #include<algorithm> #include<cstdio> #include<map> #include<queue> using namespace std; int a,b; ],tot; bool f(int x) { ) ; ;i*i<=x;i++) ) ; ; } int mai…

先判断n是否为素数然后把n转化成d进制下再反转,转化为十进制的num判断num是否为素数 注意n为0和1时,不是素数!!!注意反转后的num也有可能为1,不是素数!!! #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> using namespace std; int n,d; bool isprime(in…

转换进制&&逆序可以在一起进行,有一点技巧,不要用十进制数来表示低进制,容易溢出. #include <iostream> #include <vector> using namespace std; bool isPrime(int n) { if(n < 2) return false; if(n == 2) return true; if(n % 2 == 0) return false; for(int i = 3; i < n; i += 2)…

the problem is from PAT,which website is http://pat.zju.edu.cn/contests/pat-a-practise/1015 this problem is relatively easy.if there must be something which need to be noticed, i think "1 is not a prime" could be one of them. #include<stdio.h…

problem A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integ…

A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N (&…

A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N (&…

1015. Reversible Primes (20) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a…

1015 Reversible Primes(20 分) A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given a…

1035 Password(20 分) To prepare for PAT, the judge sometimes has to generate random passwords for the users. The problem is that there are always some confusing passwords since it is hard to distinguish 1 (one) from l (L in lowercase), or 0 (zero) fro…

1035 Password (20 分)   To prepare for PAT, the judge sometimes has to generate random passwords for the users. The problem is that there are always some confusing passwords since it is hard to distinguish 1 (one) from l (L in lowercase), or 0 (zero)…

1088 三人行(20 分) 子曰:"三人行,必有我师焉.择其善者而从之,其不善者而改之." 本题给定甲.乙.丙三个人的能力值关系为:甲的能力值确定是 2 位正整数:把甲的能力值的 2 个数字调换位置就是乙的能力值:甲乙两人能力差是丙的能力值的 X 倍:乙的能力值是丙的 Y 倍.请你指出谁比你强应"从之",谁比你弱应"改之". 输入格式: 输入在一行中给出三个数,依次为:M(你自己的能力值).X 和 Y.三个数字均为不超过 1000 的正整数.…

Reversible Primes A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two posi…

1077 Kuchiguse(20 分) The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the speaker's personality. Such a preference is called "Kuchiguse" and is often…

1008 Elevator(20 分) The highest building in our city has only one elevator. A request list is made up with N positive numbers. The numbers denote at which floors the elevator will stop, in specified order. It costs 6 seconds to move the elevator up o…

1077 Kuchiguse (20 分)   The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the speaker's personality. Such a preference is called "Kuchiguse" and is of…

1061 Dating (20 分)   Sherlock Holmes received a note with some strange strings: Let's date! 3485djDkxh4hhGE 2984akDfkkkkggEdsb s&hgsfdk d&Hyscvnm. It took him only a minute to figure out that those strange strings are actually referring to the cod…

1042 Shuffling Machine (20 分)   Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "inside jobs" where employees collaborate with gamblers by performi…

A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime because its reverse 37 is also a prime. Now given any two positive integers N (&…

https://pintia.cn/problem-sets/994805342720868352/problems/994805495863296000 A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a reversible prime be…