Submission #938595

#	Time	Username	Problem	Language	Result	Execution time	Memory
938595		Xiaoyang	Split the sequence (APIO14_sequence)	C++17	50 / 100	2075 ms	118172 KiB

sequence

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

#define fi first 
#define se second 
#define pll pair<ll,ll>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl;
#define MP make_pair
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define ALL(x) x.begin(),x.end()
#define endl "\n"
const ll inf=1e18;

const ll maxn=11111;
ll dp[maxn][222];
ll a[maxn],pre[maxn];
pll fa[maxn][222];

void dfs(pll u){
	if(u==MP(0ll,0ll))return;
	dfs(fa[u.fi][u.se]);
	cout<<u.fi<<" ";
}
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	ll n,K;cin>>n>>K;
	rep(i,1,n+1)cin>>a[i];
	rep(i,1,n+1)pre[i]=pre[i-1]+a[i];
	rep(i,0,maxn)rep(j,0,222)dp[i][j]=-inf;
	dp[0][0]=0;
	rep(k,1,K+1){
		rep(i,1,n+1){
			rep(j,0,i){
				if(dp[j][k-1]+(pre[i]-pre[j])*(pre[n]-pre[i])>dp[i][k]){
					dp[i][k]=dp[j][k-1]+(pre[i]-pre[j])*(pre[n]-pre[i]);
					fa[i][k]=MP(j,k-1);
				}
			}
		}
	}
	/*
	rep(i,1,n+1){
		rep(j,0,K+1)cout<<dp[i][j]<<" ";
		cout<<endl;
	}
	*/
	ll mx=-inf;
	pll p=MP(0ll,0ll);
	rep(i,1,n+1){
		if(dp[i][K]>mx){
			mx=dp[i][K];
			p=MP(i,K);
		}
	}
	cout<<mx<<endl;
	dfs(p);
	return 0;
}

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