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TernaryLogic.java
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74 lines (60 loc) · 1.87 KB
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import java.math.BigDecimal;
import java.util.Scanner;
public class TernaryLogic
{
public static void main( String[] args )
{
Scanner s = new Scanner( System.in );
int a = s.nextInt();
int c = s.nextInt();
StringBuilder at = decimalToTernary( a );
StringBuilder ct = decimalToTernary( c );
int atLen = at.length();
int ctLen = ct.length();
int diff = Math.abs( atLen- ctLen );
StringBuilder zeros = new StringBuilder();
for(int i=0;i<diff;i++)
zeros.append( "0" );
if(atLen > ctLen)
{
ct = zeros.append( ct );
}
else
{
at = zeros.append( at );
}
int tSize = ct.length();
StringBuilder res = new StringBuilder();
for(int i=tSize-1;i>=0;i--)
{
int cn =Integer.parseInt(String.valueOf( ct.charAt( i ) ) );
int an = Integer.parseInt(String.valueOf( at.charAt( i ) ));
int r = cn-an;
if(r<0)
r=r+3;
res.append(r );
}
System.out.println(ternaryToDecimal( res.reverse()) );
}
private static long ternaryToDecimal(StringBuilder s)
{
BigDecimal number = new BigDecimal("0");
int l = s.length();
for(int i=0, pow = l-1;i<l;i++)
{
BigDecimal cn = new BigDecimal(String.valueOf( s.charAt( i ) ));
number = number.add( cn.multiply(new BigDecimal( Math.pow( 3, pow-- ) )) );
}
return number.longValue();
}
private static StringBuilder decimalToTernary(int n)
{
StringBuilder sb = new StringBuilder();
while(n>0)
{
sb.append( n%3 );
n=n/3;
}
return sb.reverse();
}
}