Problem - 1013 (hdu.edu.cn)

高精度算术模拟

开long没过想到开bI 开bl一次过

import java.math.BigInteger;
import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner sc = new Scanner(System.in);BigInteger i;while (!(i = sc.nextBigInteger()).equals(BigInteger.ZERO)) {BigInteger sum = BigInteger.ZERO;while (i.compareTo(BigInteger.ZERO) > 0) {sum = sum.add(i.mod(BigInteger.TEN));i = i.divide(BigInteger.TEN);}while (sum.compareTo(BigInteger.TEN) >= 0) {i = sum;sum = BigInteger.ZERO;while (i.compareTo(BigInteger.ZERO) > 0) {sum = sum.add(i.mod(BigInteger.TEN));i = i.divide(BigInteger.TEN);}}System.out.println(sum);}}
}