This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define db double
#define pairll pair<ll,ll>
#define lpairll pair<ll,pairll>
#define repp(i,a,b) for (ll i = a; i <= b; i++)
#define repz(i,a,b) for (ll i = a; i < b; i++)
#define repm(i,a,b) for (ll i = a; i >= b; i--)
#define fr first
#define sc second
#define x first
#define y second
#define mp make_pair
#define pb push_back
const ll N = 3e5+5, MOD = 1e9+7;
ll tc = 1, n, m, ar[N], br[N];
string s, s1, s2, ye = "YA", no = "TIDAK";
void input(){
cin >> n >> m;
repp(i,1,n) cin >> ar[i];
}
void solve(){
ll dp[n+5][m+5];
memset(dp,0,sizeof(dp));
repm(idx,n,1){
repp(rem,1,m){
dp[idx][rem] = dp[idx+1][rem];
ll cur = 0, maxi = 0;
repp(i,idx,n){
cur += ar[i];
maxi = max(maxi,cur);
cur = max(0LL,cur);
dp[idx][rem] = max(dp[idx][rem],maxi+dp[i+1][rem-1]);
}
}
}
cout << dp[1][m] << endl;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
//cin >> tc;
while(tc--){
input();
solve();
}
}
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