ZOJ-1292
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import java.util.Scanner;public class Main{public static void main(String[] args){Scanner sc = new Scanner(System.in);int n = sc.nextInt();sc.nextLine();for (int i = 0; i < n; i++){sc.nextLine();StringBuilder sb = new StringBuilder("0");while (true){String line = sc.nextLine();if ("0".equals(line.trim()))break;sb = add(sb, new StringBuilder(line));}if (i != 0)System.out.println();System.out.println(sb.toString());}}static StringBuilder add(StringBuilder s1, StringBuilder s2){StringBuilder result = new StringBuilder();s1 = s1.reverse();s2 = s2.reverse();int i = 0;int prev = 0;while (i < s1.length() || i < s2.length()){char c1 = i >= s1.length() ? '0' : s1.charAt(i);char c2 = i >= s2.length() ? '0' : s2.charAt(i);int res = c1 - '0' + c2 - '0' + prev;if (res < 10){result.append((char) (res + '0'));prev = 0;}else{res -= 10;prev = 1;result.append((char) (res + '0'));}i++;}if (prev == 1)result.append('1');return result.reverse();}}
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