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 (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>

void PrintOutput(char* output)
{
    printf("%s", output);
}

void JudgeSafety(int sheepInput, int wolfInput)
{
    char output[10];
    
    if(wolfInput >= sheepInput)
    {
        strcpy(output, "unsafe");
    }
    else
    {
        strcpy(output, "safe");
    }
    
    printf("%s \n", output);
}
    
void ReadInput()
{
    int sheepInput, wolfInput;
    //printf("Enter the number of sheeps and wolves: \n");
    scanf("%d %d",&sheepInput, &wolfInput);
    JudgeSafety(sheepInput, wolfInput);
}

int main(int argc, const char * argv[])
{
    ReadInput();

    return 0;
}