Submission #1150177

#	Time	Username	Problem	Language	Result	Execution time	Memory
1150177		nai0610	Split the sequence (APIO14_sequence)	C++20	0 / 100	0 ms	320 KiB

sequence

#include <bits/stdc++.h>
#define ll int64_t
#define ld long double
using namespace std;
// 
const int maxn =1e5+5;
const int mod = 1e9+7; // 998244353,1610612741
const ll inf = 1e18;
const ld pi = atan(1.0L)*4;
int n,K;
int pre[205][maxn];
ll a[maxn],s[maxn];
int main() {
    // freopen("../input.inp","r",stdin);
    // freopen("output.out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    clock_t start,end;
	start=clock();
	cin >>n>>K;
	K++;
	for (int i=1;i<=n;i++) cin >>a[i],s[i]=s[i-1]+a[i];
	vector<ll> f(n+1);
	for (int i=1;i<=n;i++) f[i]=s[i]*s[i];
	for (int k=2;k<=K;k++) {
		vector<ll> g(n+1,inf);
		for (int i=1;i<=n;i++) {
			ll val=inf;
			int pos=0;
			for (int j=1;j<=i;j++) {
				if (f[j-1]+(s[i]-s[j-1])*(s[i]-s[j-1])<val) {
					val=f[j-1]+(s[i]-s[j-1])*(s[i]-s[j-1]);
					pos=j;
				}
			}
			g[i]=val;
			pre[k][i]=pos;
		}
		swap(f,g);
	}
	cout <<(s[n]*s[n]-f[n])/2<<'\n';
	int i=n;
	vector<int> v;
	while (i) {
		i=pre[K--][i];
		if (i) v.push_back(i);
	}
	sort(v.begin(),v.end());
	for (auto i:v) cout <<i-1<<" ";
	end=clock();
	ld dur=(ld)(end-start)/(ld)(CLOCKS_PER_SEC)*(1000.0L);
	cerr<<dur<<'\n';
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29