// I also thought that there was a small chance that she likes me back.
#include <bits/stdc++.h>
using namespace std;
// Do you think you'll ever remember me someday, or will I just fade away from your memory?
#define LIFESUCK ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long
#define str string
#define mll map<ll, ll>
#define vll vector<ll>
#define pll pair<ll, ll>
#define fi first
#define se second
#define all(c) c.begin(), c.end()
#define pb push_back
#define sz(s) s.size()
#define debug cout << "I Love You\n";
#define fu(i, a, b) for (ll i = a; i <= b; i++)
#define fd(i, b, a) for (ll i = b; i >= a; i--)
#define Bisave(msk, j) ((msk >> j) & 1)
#define _log(x) 31 - __builtin_clz(x)
#define LoveTime chrono::steady_clock::now().time_since_epoch().count()
const ll Mod = 998244353;
const ll inf = (1ll << 30);
const ll lnf = (1ll << 60);
// When time passes and things change... will you still remember someone like me?
int64_t add(ll& a, ll b) {
a += b;
if (a >= Mod) a %= Mod;
while (a < 0) a += Mod;
return a;
}
int64_t mul(ll a, ll b) {
a = 1ll * a * b % Mod;
return a;
}
template <class X, class Y>
bool minimize(X& x, Y y) {
X eps = 1e-9;
if (x > y + eps) {
x = y;
return 1;
}
return 0;
}
template <class X, class Y>
bool maximize(X& x, Y y) {
X eps = 1e-9;
if (x + eps < y) {
x = y;
return 1;
}
return 0;
}
// I wonder… will I just become a distant memory to you one day?
#define mxn 300'007
ll n, k, g[mxn];
namespace Love1 {
bool check() {
fu(i, 1, n) if(g[i] < 0) return 0;
return 1;
}
void DreamyLove () {
ll sad = 0;
fu(i, 1, n) sad += g[i];
cout << sad;
//
}
}
namespace Love2 {
bool check() {
bool ok = 0;
fu(i, 1, n) {
if(g[i] < 0) {
if(ok) return 0;
ok = 1;
}
}
return 1;
}
void DreamyLove() {
ll sad = 0;
fu(i, 1, n) {
if(g[i] < 0) continue;
sad += g[i];
}
cout << sad;
//
}
}
namespace Love3 {
bool check() {
return (k == 1);
}
void DreamyLove () {
ll sad = 0, cr = 0;
fu(i, 1, n) {
cr += g[i];
maximize(sad, cr);
if(cr < 0) cr = 0;
}
cout << sad;
//
}
}
namespace Love4 {
bool check() {
return (n <= 80);
}
ll f[87][87], pref[87];
void DreamyLove () {
fu(i, 1, n) pref[i] = pref[i - 1] + g[i];
ll sad = 0;
// f[1][1] = g[1];
fu(i, 1, n) {
fu(l, 1, i) {
ll val = pref[i] - pref[l - 1];
fu(pos, 0, l - 1) fu(j, 1, k) {
maximize(f[j][i], f[j - 1][pos] + val);
maximize(sad, f[j][i]);
// cerr << i << ' ' << l << " " << pos << ' ' << j << " => " << f[j][i] << ' ' << val << '\n';
}
}
}
cout << sad;
//
}
}
namespace Love56 {
bool check() {
return (n <= 2007);
}
ll f[2007][2007], pref[2007];
ll d[2007][2007];
void DreamyLove () {
fu(i, 1, n) pref[i] = pref[i - 1] + g[i];
ll sad = 0;
fu(j, 1, k) {
fu(i, 1, n) {
d[j][i] = max(d[j][i - 1], f[j - 1][i - 1] - pref[i - 1]);
maximize(f[j][i], f[j][i - 1]);
maximize(f[j][i], d[j][i] + pref[i]);
}
}
cout << f[k][n];
//
}
}
// The world is still beautiful, only it’s a pity that you are no longer among the living.
void lovesper(const ll& Tessavease) {
cin >> n >> k;
fu(i, 1, n) cin >> g[i];
if(Love1::check()) {
Love1::DreamyLove();
return;
}
if(Love3::check()) {
Love3::DreamyLove();
return;
}
if(Love2::check()) {
Love2::DreamyLove();
return;
}
if(Love4::check()) {
Love4::DreamyLove();
return;
}
if(Love56::check()) {
Love56::DreamyLove();
return;
}
}
// In the future, each of us will have our own path..
// ...But no matter where we go, we will always be a beautiful part of each other’s memories.
signed main() {
LIFESUCK
#define name "lovesper"
// freopen(name".inp", "r", stdin);
// freopen(name".out", "w", stdout);
ll Test = 1;
// cin >> Test;
fu(i, 1, Test) {
lovesper(i);
if (i < Test) cout << '\n';
}
return 0;
}
