C++ :

#include <iostream>
#include <climits>
using namespace std;
int main() {
	int n;
  cin >> n;
  int minv = INT_MAX, maxv = INT_MIN;
  for (int i = 0; i < n; ++i) {
    int x;
  	cin >> x;
    minv = x < minv ? x : minv;
    maxv = x > maxv ? x : maxv;
  }
  printf("%d\n", maxv - minv);
  return 0;
}