include <algorithm> // sort
 #include <iostream>
 using namespace std;

 int N, K, p[1010];

 int main(){
 cin >> N >> K;
 for(int i = 0; i < N; ++i) cin >> p[i];
 sort(p, p + N);
 int ans = 0;
 for(int i = 0; i < K; ++i) ans += p[i];
 cout << ans << endl;
 }
