Submission #1013131

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013131		Luvidi	Split the sequence (APIO14_sequence)	C++17	0 / 100	73 ms	131072 KiB

sequence

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

#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

void solve() {
    int n,k;
    cin>>n>>k;
    k++;
    ll a[n+1],pre[n+1];
    pre[0]=0;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        pre[i]=pre[i-1]+a[i];
    }

    ll dp[n+1][k+1],prev[n+1][k+1];
    memset(dp,0,sizeof(dp));
    for(int i=0;i<=n;i++){
        for(int j=i+1;j<=k;j++)dp[i][j]=-1e18;
        if(i)dp[i][0]=-1e18;
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=k;j++){
            int y=lower_bound(pre+1,pre+n+1,pre[i]-pre[i]/j)-pre;
            for(int x=0-2;x<3;x++){
                int p=max(1,min(y+x,i));
                dp[i][j]=max(dp[i][j],pre[p-1]*(pre[i]-pre[p-1])+dp[p-1][j-1]);
                if(dp[i][j]==pre[p-1]*(pre[i]-pre[p-1])+dp[p-1][j-1])prev[i][j]=p-1;
            }
        }
    }
    cout<<dp[n][k]<<'\n';
    vector<int> ans;
    int c=n,x=k;
    while(c){
        ans.pb(c);
        c=prev[c][x];
        x--;
    }
    reverse(ans.begin(),ans.end());
    ans.pop_back();
    for(int i:ans)cout<<i<<' ';
}

int main() {   
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();
}

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