Submission #602579

#	Time	Username	Problem	Language	Result	Execution time	Memory
602579		berr	Kpart (eJOI21_kpart)	C++17	30 / 100	2017 ms	129432 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
int32_t main()
{
    ios_base::sync_with_stdio(false); cin.tie(0);
    int t; cin>>t; 
    while(t--)
    {
        int n; cin>>n;
        vector<int> pre(n), a(n), count(n+1);
        for(int i=0; i<n; i++)
        {
            cin>>a[i]; 
            if(i==0) pre[i]=a[i];
            else pre[i]=pre[i-1]+a[i];
        }
 
        vector<vector<int>> check(n, vector<int>(pre[n-1]+5, 0));
        vector<int> knp(pre[n-1]+5, -1);
 
        knp[0]=0;
        for(int i=0; i<n; i++)
        {
            for(int l=2; l<=i+1; l++)
            {
                int a=pre[i];
                if(i-l>=0) a-=pre[i-l];
                if(a%2==0)
                {
                    check[i][a/2]=l;
                }
            }
        }
        count[n]=1;
 
        for(int i=n-1; i>=0; i--)
        {
            count[i]=count[i+1]+1;
 
        }   
 
 
        for(int i=0; i<n; i++)
        {
            if(i>0)
            {
                for(int l=pre[i-1]; l>0; l--)
                {
                    if(knp[l]!=-1)
                    {
                        knp[l+a[i]]=max(knp[l+a[i]], knp[l]);
     
                        if(check[i][l+a[i]]&&knp[l+a[i]]>=i-check[i][l+a[i]]+1)
                        {
                            count[check[i][l+a[i]]]--;
                        }
                    }
                }
            }
            knp[a[i]]=max(knp[a[i]], i);
            if(check[i][a[i]]&&knp[a[i]]>=i-check[i][a[i]]+1)
            {
                count[check[i][a[i]]]--;
            }
           
 
        }
 
        vector<int> ans;
        for(int i=2; i<=n; i++)
        {
            if(count[i]==0) ans.push_back(i);
        }
 
        cout<<ans.size()<<" ";
        for(auto i: ans) cout<<i<<" ";
            cout<<"\n";
 
 
    }
   
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 70