#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
typedef long long ll;
#define MOD 1000000007
using namespace std;
int main() {
    ll n, k, m;
    cin >> n >> k >> m;
    vector<ll> a(n), rui(n + 1, 0);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
        rui[i + 1] = rui[i] + a[i];
    }
    vector<vector<ll>> dp(n + 1, vector<ll>(k + 1, INT_MIN / 3));
    dp[0][0] = 0;
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            for(int l = 0; l < k; l++) {
                if(i - j >= 0) {
                    dp[i + 1][l + 1] =
                        max(dp[i + 1][l + 1],
                            dp[i - j][l] + abs(rui[i + 1] - rui[i - j]));
                }
            }
        }
    }
    cout << dp[n][k] << endl;
}