// template.cpp
// use inp.txt/out.txt for file IO
/*
Pragma:
If ever in doubt about whether your pragmas are correct,
turn on most compiler warnings with the command-line option -Wall(or the more specific -Wunknown-pragmas).
use assert(__builtin_cpu_supports("avx2")) to check if intruction set is available
*/
// #pragma GCC optimize ("O2,unroll-loops")
// #pragma GCC optimize("no-stack-protector,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("O3","unroll-loops")
// #pragma GCC optimize ("Ofast")
// #pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")
// #pragma GCC target("sse4") // instead of avx2
// __attribute__((target("avx2"), optimize("O3", "unroll-loops")))
#include <bits/stdc++.h>
#define oo (2000'000'00)
#define cif(i, n) for(int i = 0; i < n; i++)
#define ccif(i, l, r) for(int i = l; i < r; i++)
#define rif(i, n) for(int i = n-1; i >= 0; i--)
#define rrif(i, l, r) for(int i = r-1; i >= l; i--)
#define scan(a, __n) {for(int __ = 0; __ < __n; __++)cin >> a[__];}
#define print(a, __n) {for(int __ = 0; __ < __n; __++)cout << a[__] << ' '; cout << '\n';}
#define sz(s) ((int)s.size())
#define dbg(x) cerr << #x << " : " << x << endl;
#define rep(i, l, r) for(int i = l; i < r; i++)
// #define mset(a, chr) memset(a, chr, sizeof a)
#define mset(a) memset(a, 0, sizeof a)
// #define int ll
#define fastIO ios::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define uni(v) sort(all(v)), v.resize(unique(all(v))-v.begin());
#define c0 (v<<1)
#define c1 (c0|1)
#define md ((l+r)/2)
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vii;
typedef vector<pll> vll;
typedef vector<ld> vd;
typedef pair<ld, ld> pt;
typedef vector<pt> vpt;
// const int maxFac = 1e6+7;
// ll fac[maxFac], _fac[maxFac];
// ll po(ll b, ll p){
// b %= mod;
// p %= mod-1;
// ll r = 1;
// while(p){
// if(p&1)r = r*b%mod;
// p >>= 1;
// b = b*b%mod;
// }
// return r;
// }
// ll choose(ll k, ll n){
// return fac[n]*_fac[k]%mod*_fac[n-k]%mod;
// }
// ll factorial(ll n, ll k){
// ll ret = 1;
// for(ll i = n; i >= n-k+1; i--){
// ret = ret*i%mod;
// }
// return ret;
// }
// vii adj = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
const int maxN = 1e5+7;
const int maxK = 1e2+7;
int dp[maxK][maxN];
inline void slv(){
int n, k;
cin >> n >> k;
int a[n+1];
for(int i = 1; i <= n; i++)cin >> a[i];
for(int i = 0; i <= n; i++)for(int j = 0; j <= k; j++)dp[j][i] = oo;
dp[0][0] = 0;
dp[1][1] = a[1];
for(int i = 2; i <= n; i++){
dp[1][i] = max(a[i], dp[1][i-1]);
}
for(int j = 2; j <= k; j++){
vii st;
int mnal = dp[j-1][j-1];
st.push_back({j-1, dp[j-1][j-1]});
for(int i = j; i <= n; i++){
int mn = oo;
while(sz(st) > 0 && a[st.back().ff] <= a[i]){
mn = min(mn, st.back().ss);
st.pop_back();
}
if(sz(st)){
st.back().ss = min(st.back().ss, mn);
dp[j][i] = min(a[i] + st.back().ss, dp[j][st.back().ff]);
}
else{
dp[j][i] = a[i] + mnal;
}
st.push_back({i, dp[j-1][i]});
mnal = min(mnal, dp[j-1][i]);
}
}
cout << dp[k][n] << '\n';
}
/*
*/
inline void prep(){
// fac[0] = 1;
// for(int i = 1; i < maxFac; i++)fac[i] = fac[i-1]*i%mod;
// _fac[maxFac-1] = po(fac[maxFac-1], mod-2);
// for(int i = maxFac-2; i >= 0; i--)_fac[i] = _fac[i+1]*(i+1)%mod;
// w[0] = 1;
// for(int i = 1; i < maxN; i++)w[i] = w[i-1]*p%mod;
// _w[maxN-1] = po(w[maxN-1], mod-2);
// for(int i = maxN-2; i >= 0; i--)_w[i] = _w[i+1]*p%mod;
// for(int i = 2; i < maxN; i++){
// if(lp[i] == 0){
// lp[i] = i;
// pr.push_back(i);
// }
// for (int j = 0; i * pr[j] < maxN; ++j) {
// lp[i * pr[j]] = pr[j];
// if (pr[j] == lp[i]) {
// break;
// }
// }
// }
}
signed main(){
// freopen("blocks.in", "r", stdin);
// freopen("blocks.out", "w", stdout);
fastIO;
// cout << fixed << setprecision (15);
prep();
int t = 1;
// cin >> t;
while(t--){
// cout << slv() << '\n';
slv();
// string s;
// cin >> s;
// bool x = slv();
// cout << (x?"YES":"NO") << '\n';
}
cout.flush();
}
/*
*/
