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package Conversions;

import java.util.Scanner;
// given a source number , source base, destination base, this code can give you the destination
// number.
// sn ,sb,db ---> ()dn  .   this is what we have to do    .

public class AnytoAny {

  public static void main(String[] args) {
    Scanner scn = new Scanner(System.in);
    int sn = scn.nextInt();
    int sb = scn.nextInt();
    int db = scn.nextInt();
    int m = 1, dec = 0, dn = 0;
    while (sn != 0) {
      dec = dec + (sn % 10) * m;
      m *= sb;
      sn /= 10;
    }
    m = 1;
    while (dec != 0) {
      dn = dn + (dec % db) * m;
      m *= 10;
      dec /= db;
    }
    System.out.println(dn);
    scn.close();
  }
}

AnytoAny

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