/**

* One of the first users of BIT’s new supercomputer was Chip Diller. He extended his exploration of

* powers of 3 to go from 0 to 333 and he explored taking various sums of those numbers.

* “This supercomputer is great,” remarked Chip. “I only wish Timothy were here to see these results.”

* (Chip moved to a new apartment, once one became available on the third floor of the Lemon Sky

* apartments on Third Street.)

* Input

* The input will consist of at most 100 lines of text, each of which contains a single VeryLongInteger.

* Each VeryLongInteger will be 100 or fewer characters in length, and will only contain digits (no

* VeryLongInteger will be negative).

* The final input line will contain a single zero on a line by itself.

* Output

* Your program should output the sum of the VeryLongIntegers given in the input.

* Sample Input

* 123456789012345678901234567890

* 123456789012345678901234567890

* 123456789012345678901234567890

* 0

* Sample Output

* 370370367037037036703703703670

*/

//https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&category=&problem=365

import java.math.BigInteger;

import java.util.Scanner;

public class IntegerInquiry {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

BigInteger sum = BigInteger.ZERO;

while (true) {

BigInteger number = input.nextBigInteger();

if (number.equals(BigInteger.ZERO)) {

break;

}

sum = sum.add(number);

}

System.out.println(sum);

}

}