Problem:
Score : 100 points

Problem Statement

There are S sheep and W wolves.

If the number of wolves is greater than or equal to that of sheep, the wolves will attack the sheep.

If the wolves will attack the sheep, print unsafe; otherwise, print safe.

Constraints

1 \leq S \leq 100

1 \leq W \leq 100

Input

Input is given from Standard Input in the following format:

S W

Output

If the wolves will attack the sheep, print unsafe; otherwise, print safe.

Sample Input 1

4 5

Sample Output 1

unsafe

There are four sheep and five wolves. The number of wolves is not less than that of sheep, so they will attack them.

Sample Input 2

100 2

Sample Output 2

safe

Many a sheep drive away two wolves.

Sample Input 3

10 10

Sample Output 3

unsafe

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)


using System;

class IDONTKNOWCSHARP
{
    public static void Main()
    {
        int[] values=Convert(GetLines());

        int S=values[0];
        int W=values[1];

        if (W >= S)
        Console.WriteLine("unsafe");
        else
        Console.WriteLine("safe");

    }


    static int[] Convert(string[] v)
    {
        var temp = new int[v.Length];

        for (int i = 0; i < temp.Length; i++)
        {
            temp[i] = int.Parse(v[i]);
        }

        return temp;
    }




    static string[] GetLines()
    {
        return Console.ReadLine().Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
    }


}