View Code of Problem 3497

import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while(scanner.hasNext()){
            String A0 = scanner.next();
            String A1 = scanner.next();
            String A2 = scanner.next();
            BigDecimal a = new BigDecimal(A0);
            BigDecimal b = new BigDecimal(A1);
            BigDecimal c = new BigDecimal(A2);
            BigDecimal res = new BigDecimal(0);
            for (int i = 3; i <= 99; i++) {
                res = a.add(b.add(c));
                a = b;
                b = c;
                c = res;
            }
            System.out.println(res.toPlainString());
        }
    }
}