/* Use the slash-star style comments or the system won't see your
identification information */
/*
ID: lincans1
LANG: JAVA
TASK: palsquare
*/
import java.io.*;
import java.util.*;
public class palsquare {
private String string = "0123456789ABCDEFGHIJK";
private int B;
private boolean isPalindromic(String num) {
for (int i = 0, n = num.length()/2; i < n; i++) {
if (num.charAt(i) != num.charAt(num.length() - 1- i)) {
return false;
}
}
return true;
}
private String convert2B(int num) {
Stack<Character> stack = new Stack<>();
do {
int r = num % B;
num = num / B;
stack.push(string.charAt(r));
} while (num != 0);
StringBuilder b = new StringBuilder();
while (!stack.isEmpty()) {
b.append(stack.pop());
}
return b.toString();
}
public palsquare() throws IOException {
// Use BufferedReader rather than RandomAccessFile; it's much faster
BufferedReader f = new BufferedReader(new FileReader("palsquare.in"));
PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("palsquare.out")));
this.B = Integer.parseInt(f.readLine());
for (int i = 1; i <= 300; i++) {
String square = convert2B(i * i);
if (isPalindromic(square)) {
out.println(convert2B(i) + " " + square);
}
}
out.close(); // close the output file
}
public static void main (String [] args) throws IOException {
new palsquare();
}
}
[Java] Palindromic Squares
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转载自blog.csdn.net/weixin_41714373/article/details/111994855
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