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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Find-palindromic-numbers-in-both-binary-and-ternary-bases/Java/find-palindromic-numbers-in-both-binary-and-ternary-bases.java Normal file
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@ -0,0 +1,18 @@
public class Pali23 {
public static boolean isPali(String x){
return x.equals(new StringBuilder(x).reverse().toString());
}
public static void main(String[] args){
for(long i = 0, count = 0; count < 6;i++){
if((i & 1) == 0 && (i != 0)) continue; //skip non-zero evens, nothing that ends in 0 in binary can be in this sequence
//maybe speed things up through short-circuit evaluation by putting toString in the if
//testing up to 10M, base 2 has slightly fewer palindromes so do that one first
if(isPali(Long.toBinaryString(i)) && isPali(Long.toString(i, 3))){
System.out.println(i + ", " + Long.toBinaryString(i) + ", " + Long.toString(i, 3));
count++;
}
}
}
}