#include <cstdio>
#define NMAX 16005
using namespace std;

FILE *f = freopen("transport.in", "r", stdin);
FILE *g = freopen("transport.out", "w", stdout);

int v[NMAX], n, k, maxim, s=0;

void read() {
    scanf("%d%d", &n, &k);
    for(int i = 1; i<=n; i++)
    {
        scanf("%d", &v[i]);
        s += v[i];
        if(v[i] > maxim)
            maxim = v[i];
    }
}
int verif(int v[], int n, int k, int val) {
    int s = 0;
    for(int i = 1; i<=n; i++)
    {
        s += v[i];
        if(s == val)
        {
            s = 0;
            k --;
        }
        else if(s > val){
            s = 0;
            i --;
            k --;
        }
        if(k == 0 && i < n)
            return 0;
    }
    if(k < 0) return 0;
    return 1;
}
void solve() {
    bool ok = false;
    while(!ok) {
        if(verif(v, n, k, maxim))
            {
                ok = true;
                printf("%d", maxim);
            }
        maxim ++;
    }
}
int main() {
    read();
    solve();
    return 0;
}