#include "bits/stdc++.h" using namespace std; int m,n,m1[105],n1[10005]; int main(){ cin>>n>>m; for(int i=0;i<n;i++){ cin>>n1[i]; sort(m1,m1+m); m1[0]+=n1[i]; } sort(m1,m1+m); cout<<m1[m-1]; }