生词以及在文中意思

forward 向前地  backward 向后地  palindromic 回文的  base 基数(如十进制的10 和二进制的2)  numeral system 数制  decimal system 十进制

notation 记法

这题并不是单纯的进制转换。而是要求输入n和b,将n转换为a0*b^0+a1*b^1+......+ak*b^k的和的形式。再对a0,a1,.....,ak进行判断回文串。

import java.util.ArrayList;
import java.util.Scanner; public class Main { public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int m=sc.nextInt();
if(n==0) {
System.out.println("Yes");
System.out.print("0");
return;
}
ArrayList<String> l=new ArrayList<String>();
while(n!=0) {
l.add(Integer.toString(n%m));
n/=m;
}
boolean IsTrue=true;
for(int i=0;i<l.size()/2;i++) {
if(!(l.get(i).equals(l.get(l.size()-1-i)))) {
IsTrue=false;
break;
}
}
if(IsTrue) {
System.out.println("Yes"); }
else {
System.out.println("No");
}
System.out.print(l.get(l.size()-1));
for(int i=l.size()-2;i>=0;i--) {
System.out.print(" "+l.get(i));
}
} }

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