// Allison Obourn, CSE 142
// Displays average gas prices for the USA and Belgium calculated from
// data from a file.

import java.io.*;
import java.util.*;

public class GasPrices {
	public static void main(String[] args) throws FileNotFoundException {
		Scanner input = new Scanner(new File("gasprices.txt"));
		
		double belgium = 0;
		double usa = 0;
		int count = 0;
		
		while(input.hasNext()) {
			belgium += input.nextDouble();
			usa += input.nextDouble();
			count++;
			input.next();
		}
		
		System.out.println("Belgium average: " + belgium / count + " $/gal");
		System.out.println("USA average: " + usa / count + " $/gal");
	}
	
}