#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { int N, K; vector<int> v; cin >> N >> K; for (int i = 0; i < N;i++) { int temp; cin >> temp; v.push_back(temp); } sort(v.begin(), v.end()); cout << v[N - 1] - v[0] << endl; return 0; }