Problem:
Score : 100 points

Problem Statement

Takahashi has a strong stomach. He never gets a stomachache from eating something whose "best-by" date is at most X days earlier.
He gets a stomachache if the "best-by" date of the food is X+1 or more days earlier, though.

Other than that, he finds the food delicious if he eats it not later than the "best-by" date. Otherwise, he does not find it delicious.

Takahashi bought some food A days before the "best-by" date, and ate it B days after he bought it.

Write a program that outputs delicious if he found it delicious, safe if he did not found it delicious but did not get a stomachache either, and dangerous if he got a stomachache.

Constraints

1 ≤ X,A,B ≤ 10^9

Input

Input is given from Standard Input in the following format:

X A B

Output

Print delicious if Takahashi found the food delicious; print safe if he neither found it delicious nor got a stomachache; print dangerous if he got a stomachache.

Sample Input 1

4 3 6

Sample Output 1

safe

He ate the food three days after the "best-by" date. It was not delicious or harmful for him.

Sample Input 2

6 5 1

Sample Output 2

delicious

He ate the food by the "best-by" date. It was delicious for him.

Sample Input 3

3 7 12

Sample Output 3

dangerous

He ate the food five days after the "best-by" date. It was harmful for him.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)


import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Main main = new Main();
		main.solveB();
	}

	private void solveA() {
		Scanner sc = new Scanner(System.in);
		String N = sc.nextLine();
		String n = null;

		if (N.equals("000")) {
			n = "0";
			System.out.println(n);
		} else if (N.equals("001")) {
			n = "1";
			System.out.println(n);
		} else if (N.equals("010")) {
			n = "1";
			System.out.println(n);
		} else if (N.equals("100")) {
			n = "1";
			System.out.println(n);
		} else if (N.equals("011")) {
			n = "2";
			System.out.println(n);
		} else if (N.equals("101")) {
			n = "2";
			System.out.println(n);
		} else if (N.equals("110")) {
			n = "2";
			System.out.println(n);
		} else if (N.equals("111")) {
			n = "3";
			System.out.println(n);
		} else {
			System.out.println("a");

		}

	}

	private void solveB() {
		Scanner sc = new Scanner(System.in);
		int X = sc.nextInt();
		int A = sc.nextInt();
		int B = sc.nextInt();


		if(B-A<X){
			System.out.println("delicious");
		}else if(B-A==X){
			System.out.println("safe");
		}else{
			System.out.println("dangerous");

		}
	}

	private void solveC() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println(N);
	}

	private void solveD() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println(N);
	}

	private void solveE() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println(N);
	}

	private void solveF() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println(N);
	}

}