#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); i ++)
using namespace std;
using ll = long long;
using PL = pair<ll,ll>;
using P = pair<int,int>;
constexpr int INF = 1000000000;
constexpr long long HINF = 1000000000000000;
constexpr long long MOD = 1000000007;// = 998244353;
constexpr double EPS = 1e-4;
constexpr double PI = 3.14159265358979;


struct Debug {
    template<class T> static void print_value(T value,const char* name) {
        cout << name << ": " << value << '\n';
    }
    template<class T> static void print_vector(vector<T> &vec,const char* name) {
        for (int i = 0;i < vec.size();++i) {
            cout << "  " << name;
            printf("[%d]: ",i);
            cout << vec[i];
        }
        cout << '\n';
    }
    template<class T> static void print_2dvector(vector<vector<T>> &vec,const char* name) {
        for (int i = 0;i < vec.size();++i) {
            for (int j = 0;j < vec[i].size();++j) {
                cout << "  " << name;
                printf("[%d][%d]: ",i,j);
                cout << vec[i][j];
            }
            cout << '\n';
        }
    }
    template<class T> static void print_set(set<T> &st,const char* name) {
        int i = 0;
        for (auto itr = st.begin();itr != st.end(); ++itr,++i) {
            cout << "  " << name;
            printf("[%d]: ",i);
            cout << *itr;
        }
        cout << '\n';
    }

    template<class T1,class T2>
    static void print_map(map<T1,T2> &mp,const char* name) {
        for (auto p: mp) {
            cout << "  " << name << '[' << p.first << ']' << ": " << p.second;
        }
        cout << '\n';
    }
};

int main() {
    int N,K,M; cin >> N >> K >> M;
    vector<ll> A(N + 1);
    rep(i,N) cin >> A[i + 1];
    rep(i,N) A[i + 1] += A[i];

    vector<vector<ll>> dp(K + 1,vector<ll>(N + 1,0));
    rep(i,N) dp[1][i + 1] = abs(A[i + 1] - A[0]);

    for (int i = 1;i < K;++i){
        rep(j,N) {
            for (int k = max(j - M,0);k <= j;++k) {
                dp[i + 1][j + 1] = max(dp[i + 1][j + 1],dp[i][k] + abs(A[j + 1] - A[k]));
            }
        }
    } 
    //Debug::print_vector(A,"A");
    //Debug::print_2dvector(dp,"dp");
    cout << dp.back().back() << '\n';
    return 0;
}