杭电ACM题目1002题Java代码——String实现

import java.util.Scanner;

public class Main{

public static void main(String[] args){

Scanner s = new Scanner(System.in);

int c,k,i,j=0,l,m;

StringBuilder z,a,b,r,t,o;

z=new StringBuilder();

a=new StringBuilder();

b=new StringBuilder();

r=new StringBuilder();

t=new StringBuilder();

o=new StringBuilder();

while(s.hasNextInt()){

c=s.nextInt();

s.nextLine();

for(k=1;k<=c;k++){

z.append(s.nextLine());

a.append(z.substring(0,z.indexOf(" ")));

b.append(z.substring(z.indexOf(" ")+1,z.length()));

i=a.length();

m=b.length();

if(i>m){

t.append(a.substring(0,i-m));

}else{

t.append(b.substring(0,m-i));

}

for(;i>0&&m>0;i--,m--){

l=j+Integer.valueOf(a.substring(i-1,i))+Integer.valueOf(b.substring(