이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL)
#define S second
#define F first
#define pb push_back
using namespace std;
const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
long long n, k, a[N], pre[N], par[100005][205];
vector<long long> dp(N), cur_dp(N);
long long C(int i, int j){
return (pre[i] - pre[j]) * pre[j];
}
void compute(int l, int r, int tl, int tr, int kk){
if(l > r)
return;
int mid = (l + r) / 2;
pair<long long, int> p = {INT_MIN, mid};
for(int i = tl; i < min(mid, tr + 1); ++i){
if((dp[i] + C(mid, i)) > p.F){
p.F = dp[i] + C(mid, i);
p.S = i;
}
}
par[mid][kk] = p.S;
cur_dp[mid] = p.F;
compute(l, mid - 1, tl, p.S, kk);
compute(mid + 1, r, p.S, tr, kk);
}
void solve(){
cin >> n >> k;
for(int i = n - 1; i >= 0; --i)
cin >> a[i];
pre[0] = a[0];
for(int i = 1; i < n; ++i)
pre[i] = pre[i - 1] + a[i];
for(int i = 1; i <= k; ++i){
compute(0, n - 1, 0, n - 1, i);
dp = cur_dp;
}
cout << dp[n - 1] << '\n';
int pos = n - 1, ct = k;
while(ct > 0){
cout << n - par[pos][ct] - 1 << ' ';
pos = par[pos][ct];
--ct;
}
}
int main(){
fast;
int t = 1;
// cin >> t;
while(t--)
solve();
return 0;
}
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