Spoj absys

hello_hi 2013-09-01 11:35:57 UTC #1

in ideone my code is running fine,but on spoj it's giving runtime error nzec...I think it has something to do with blank lines,but i have taken care of blank lines...my code is

import java.io.*;
class ABSYS
 {
  public static void main(String br[])throws Exception
   {
     BufferedReader ob=new BufferedReader(new InputStreamReader(System.in));
	 int t=Integer.parseInt(ob.readLine());
	 int a1=1,b1=1,c1=1;
	 for(int j=0;j<t;j++)
	  {
	   ob.readLine();
	   String s=ob.readLine();
	   String a=s.substring(0,(s.indexOf('+'))-1);
	   String b=s.substring((s.indexOf('+'))+2,(s.indexOf('='))-1);
	   String c=s.substring((s.indexOf('='))+2,s.length());
	   for(int i=0;i<a.length();i++)
	    { 
		 if(a.charAt(i)=='m')
		  {
		   a1=0;
		   break;
		  }
		} 
       for(int i=0;i<b.length();i++)
	    { 
		 if(b.charAt(i)=='m')
		  {
		   b1=0;
		   break;
		  }
		}  
       for(int i=0;i<c.length();i++)
	    { 
		 if(c.charAt(i)=='m')
		  {
		   c1=0;
		   break;
		  }
		}  	
    	
	
    if(a1==0)
	  a=String.valueOf((Integer.parseInt(c))-(Integer.parseInt(b)));
	if(b1==0)
	  b=String.valueOf((Integer.parseInt(c))-(Integer.parseInt(a)));
	if(c1==0)
	  c=String.valueOf((Integer.parseInt(a))+(Integer.parseInt(b)));
	   System.out.println(a+" + "+b+" = "+c);
	  }
   }
 }

leppyr64 2013-09-02 13:47:28 UTC #2

s doesn't have an index of s.length?

davidfashion 2013-09-24 23:22:13 UTC #3

The problem is the code "ob.readLine()". this is executed twice, once for each test case. This code should be executed only once.

For example, the foll\owing input will result in an "java.lang.StringIndexOutOfBoundsException":

3
23 + 47 = machula
3247 + 5machula2 = 3749
machula13 + 75425 = 77038

luckymastermin 2013-09-26 04:40:03 UTC #4

The main problem is the way you are reading the input, You should use StringTokenizer to read token ans seperate them.
[bbone=java,628]
int x[] = new int[3];
br.readLine();
StringTokenizer st = new StringTokenizer(br.readLine(), " [+= ");
for (int i = 0; i < 3; i++) {
String s = st.nextToken();
if(!s.contains("machula")){
x[i]=new Integer(s);
[/bbone]