import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
       
        long a=Long.parseLong(sc.next());
        long b=Long.parseLong(sc.next());
        long c=Long.parseLong(sc.nextLine());
        System.out.print(a+b+c);
    }
}

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NumberFormatException: for input string: " 567"

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키보드 입력값: "123 345 567"