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LychrelNumbers.java
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LychrelNumbers.java
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package dev;
import java.math.BigInteger;
public class LychrelNumbers {
static BigInteger reverseNumber(BigInteger n) {
return new BigInteger(new StringBuilder().append(n).reverse().toString());
}
static boolean isPalindrome(BigInteger x) {
return x.compareTo(reverseNumber(x)) == 0;
}
public static void main(String[] args) {
BigInteger sum;
BigInteger tempN;
int counter;
int lychrelCounter = 0;
for (int i = 1; i <= 10000; i++) {
tempN = BigInteger.valueOf(i);
counter = 0;
sum = BigInteger.valueOf(10);
while (!isPalindrome(sum)) {
sum = reverseNumber(tempN).add(tempN);
tempN = sum;
counter++;
if (counter > 50) {
lychrelCounter++;
break;
}
}
}
System.out.println(lychrelCounter);
}
}