BIG A+B

java

import java.util.Scanner;

public class aplusb {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		String a = "";
		String b = "";
		while(a.isEmpty()||b.isEmpty()) {
			if(a.isEmpty()) {
				a=input.nextLine();
			}
			if(b.isEmpty()) {
				b=input.nextLine();
			}
		}
		input.close();
		System.out.println(add(a,b));
	}
	
	public static String add(String a, String b) {
		int sizeA = a.toCharArray().length;
		int sizeB = b.toCharArray().length;
		int sizeMAX = (sizeA>sizeB)?sizeA+1:sizeB+1;
		int[] addedr = new int[sizeMAX];
		int addstore = 0;
		
		String small = (sizeA>sizeB)?b:a;
		String big = (sizeA>sizeB)?a:b;
		
		String sr = reverse(small);
		String br = reverse(big);
		
		char[] src = sr.toCharArray();
		char[] brc = br.toCharArray();
		
		
		for(int i=0;i<sizeMAX;i++) {
			int sd = 0,bd = 0;
			try {
				sd = (i<src.length)?Integer.parseInt(String.valueOf(src[i])):0;
				bd = (i<brc.length)?Integer.parseInt(String.valueOf(brc[i])):0;
			} catch (Exception e) {
				System.out.println(a);
				System.out.println(b);
			}
			
			int curadd = sd+bd+addstore;
			addstore=0;
			if(curadd>=10) {
				addstore = 1;
			}
			addedr[i]=curadd%10;
		}
		
		String r = "";
		for(int i=0;i<addedr.length;i++) {
			if(i==addedr.length-1&&addedr[i]==0) {
				;
			}else {
				r+=addedr[i];
			}	
		}
		return reverse(r);
	}
	
	public static String reverse(String a) {
		String r = "";
		char[] ac = a.toCharArray();
		for(int i = ac.length-1;i>=0;i--) {
			r+=ac[i];
		}
		return r;
	}

}