OJ Board

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import static java.lang.System.in;

import java.util.Scanner;

public class Main {

	// 272 - TEX Quotes
	
	public static void main(String[] args) {
		Scanner read = new Scanner(in);
		String line, text = "", output = "";
		boolean open = true, close = false;
		int length;
		while(read.hasNextLine()){
			line = read.nextLine();
			
			length = line.length();
			
			for(int i = 0; i < length && i != -1; i++){
					
				if(line.indexOf("\"") != -1 && open){
					line = line.replaceFirst("\"","``");
					open = false;
					close = true;
										
				}
				
				if(line.indexOf("\"") != -1 && close){
					line = line.replaceFirst("\"","''");
					open = true;
					close = false;										
				}
				
				i = line.indexOf("\"") - 1;
								
			}
			
			output = output + line +"\n";
			
		}
		
		System.out.println(output);
	}
}