#include <iostream>

using namespace std;
int verif(int v[100], int n, int k, int c)
{
    int i=1,s=0,nr=0;
    while(i<=n)
    {
        while(s+v[i]<=c && i<=n)
            {s+=v[i];
            i++;}
        nr++;
        if(nr>k)
            return 0;
        s=0;
    }
    return 1;
}
int main()
{
    int n,k,i,v[16000],s=0,max=0,m,ls,ld,ok=0,x;
    cin>>n>>k;
    for(i=1;i<=n;i++)
    {
        cin>>v[i];
        s=s+v[i];
        if(v[i]>max)
            max=v[i];
    }
    if(k==1)
        cout<<s;
    else
    {
        ls=max;
        ld=s;
        while(ok==0)
            if(ls==ld)
            {
                ok=1;
                if(verif(v,n,k,ls)==1)
                    x=ls;
            }
            else
            {
                m=(ls+ld)/2;
                if(verif(v,n,k,m)==1)
                {
                    x=m;
                    ld=m-1;
                }
                else ls=m+1;
            }
    cout<<x;
    }

    return 0;
}