Problem:
Score : 100 points

Problem Statement

You are given two integers A and B as the input. Output the value of A + B.

However, if A + B is 10 or greater, output error instead.

Constraints

A and B are integers.

1 ≤ A, B ≤ 9

Input

Input is given from Standard Input in the following format:

A B

Output

If A + B is 10 or greater, print the string error (case-sensitive); otherwise, print the value of A + B.

Sample Input 1

6 3

Sample Output 1

9

Sample Input 2

6 4

Sample Output 2

error

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		new Main().solve();
	}
	int N;
	long A,B;
	long []h;
	void solve(){
		Scanner sc=new Scanner(System.in);
		N=sc.nextInt();
		A=sc.nextLong();
		B=sc.nextLong();
		h=new long[N];
		long suma=A+B*(N-1);
		long sumh=0;
		
		for(int i=0;i<N;i++){
			h[i]=sc.nextLong();
			sumh+=h[i];
		}
		
		if((A%2==0 &&A/2<=B)||(A%2!=0 && A/2<B)){
			if(sumh%suma==0){
				System.out.println(sumh/suma);
			}else{
				System.out.println(sumh/suma+1);
			}
		}else{
			if(sumh%suma==0){
				System.out.println(sumh/suma+1);
			}else{
				System.out.println(sumh/suma+2);
			}
		}
	}
}