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// $Id: sumcol.java,v 1.5 2007-06-20 03:32:39 bfulgham Exp $
// http://www.bagley.org/~doug/shootout/
import java.io.*;
import java.util.*;
import java.text.*;
public class sumcol {
public static void main(String[] args) {
int sum = 0;
String line;
try {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
while ((line = in.readLine()) != null) {
sum = sum + Integer.parseInt(line);
}
} catch (IOException e) {
System.err.println(e);
return;
}
System.out.println(Integer.toString(sum));
}
}
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