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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Check
{
	boolean isPermutation(String x,String y)
	{
		int q=length(x);
		int w=length(y);
		if(q==w)
		{
			for(int i=0;i<w;i++)
			{
				char r=x.indexOf(i);
				for(int j=0;j<w;j++)
				{
					char s=y.indexOf(j);
					if(r==s)
					break;
 
				}
			if(j==w)
			return 0;
			}
		return 1;	
		}
 
	}
}
class Permutation
{
public static void main (String[] args) 
{
	{
		Check c=new Check();
		boolean o=c.isPermutation("abc","bca");
	}
}
}

Main.java:12: error: cannot find symbol
		int q=length(x);
		      ^
  symbol:   method length(String)
  location: class Check
Main.java:13: error: cannot find symbol
		int w=length(y);
		      ^
  symbol:   method length(String)
  location: class Check
Main.java:18: error: possible loss of precision
				char r=x.indexOf(i);
				                ^
  required: char
  found:    int
Main.java:21: error: possible loss of precision
					char s=y.indexOf(j);
					                ^
  required: char
  found:    int
Main.java:26: error: cannot find symbol
			if(j==w)
			   ^
  symbol:   variable j
  location: class Check
Main.java:27: error: incompatible types
			return 0;
			       ^
  required: boolean
  found:    int
Main.java:29: error: incompatible types
		return 1;	
		       ^
  required: boolean
  found:    int
7 errors

Standard output is empty