Problem:
Score : 200 points

Problem Statement

It is only six months until Christmas, and AtCoDeer the reindeer is now planning his travel to deliver gifts.

There are N houses along TopCoDeer street. The i-th house is located at coordinate a_i. He has decided to deliver gifts to all these houses.

Find the minimum distance to be traveled when AtCoDeer can start and end his travel at any positions.

Constraints

1 ≤ N ≤ 100

0 ≤ a_i ≤ 1000

a_i is an integer.

Input

Input is given from Standard Input in the following format:

N
a_1 a_2 ... a_N

Output

Print the minimum distance to be traveled.

Sample Input 1

4
2 3 7 9

Sample Output 1

7

The travel distance of 7 can be achieved by starting at coordinate 9 and traveling straight to coordinate 2.

It is not possible to do with a travel distance of less than 7, and thus 7 is the minimum distance to be traveled.

Sample Input 2

8
3 1 4 1 5 9 2 6

Sample Output 2

8

There may be more than one house at a position.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void)
{
	int n,i,j,temp,sum=0;
	int array[105];
	scanf("%d",&n);
	
	for(i=0;i<n;i++){
		scanf("%d",&array[i]);
	}
	
	
	for (i = 0;i < n - 1;i++) {
		for (j = 0;j < n - 1;j++) {
			if (array[j + 1] < array[j]) {
				temp = array[j];array[j] = array[j + 1];array[j + 1] = temp;
			}
		}
	}
	
	
	for(i=0;i<n-1;i++){
		sum+=array[i+1];
		sum-=array[i];
	}
	
	printf("%d\n",sum);
	return 0;
}