oj.uz

Submission #405516

# Submission time Handle Problem Language Result Execution time Memory
405516 2021-05-16T13:44:35 Z sad Cigle (COI21_cigle) C++14
22 / 100
 207 ms 255304 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define pb push_back
using namespace std;
int n;const int N=510,M=5009;
pair<int,int>dp[N][N];int a[N],fr[M],rw[N][N][N],prf[M];
pair<int,int>mxdp[N][N];
int main()
{
    cin>>n;int ans=0;
    for(int i=1;i<n+1;i++)cin>>a[i];
    for(int i=2;i<n;i++)
    {
        int sm=0;
        for(int j=i+1;j<n+1;j++)
        {
            if(j!=i+1)
            {
                sm+=a[j-1];
                fr[sm]=1;
            }

            int s=0,rs=0;
            for(int q=i-1;q>-1;q--)
            {
                if(q!=i-1)
                {
                    s+=a[q+2];
                    if(fr[s])
                        rs++;
                }
                rw[q][i][j]=rs;
            }

        }
        for(int j=n;j>i;j--)
        {
            if(j!=i+1)
            {
                fr[sm]=0;
                sm-=a[j-1];
            }
        }

    }
    for(int m=1;m<=n;m++)
    {
        memset(prf,-1,sizeof prf);
        int re=0;
        for(int i=m;i>0;i--)
        {
            re+=a[i];
            prf[re]=i;
        }
        re=0;
        dp[m][m]={0,n+1};
        for(int i=1;i<=m;i++)
        {

            if(dp[m][i].fi>=mxdp[m][i-1].fi)
            {
                mxdp[m][i]={dp[m][i].fi,i};continue;
            }
            if(mxdp[m][i-1].fi==0){
                mxdp[m][i].se=i;continue;
            }
            mxdp[m][i]=mxdp[m][i-1];
        }
        dp[m+1][m]=mxdp[m][m];
        //cout<<rw[2][8][12];return 0;
        for(int r=m+2;r<n+1;r++)
        {re+=a[r-1];
            int last=dp[r-1][m].se;
            int mx=dp[r-1][m].fi;
            if(prf[re]==-1||prf[re]-2<0)
            {
                dp[r][m]=dp[r-1][m];
                ans=max(ans,dp[r][m].fi);continue;
            }
            if(last+2<=prf[re])
            {
                dp[r][m]={mx+1,last};
                ans=max(ans,dp[r][m].fi);continue;
            }
            pair<int,int>z=mxdp[m][prf[re]-2];
            //if(r==n&&m==8)cout<<z.fi<<endl;
            z.fi+=rw[prf[re]-2][m][r];
            if(z.fi>mx)
            {
                dp[r][m]={z.fi,z.se};
                ans=max(ans,dp[r][m].fi);continue;
            }
            dp[r][m]=dp[r-1][m];
            ans=max(ans,dp[r][m].fi);
            continue;
        }
    }
    cout<<ans;

}
/*
10
2 3 2 1 1 5 5 2 5 1
*/

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 1 ms 972 KB Output is correct

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7492 KB Output is correct
12 Correct 4 ms 7508 KB Output is correct
13 Correct 4 ms 7532 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Correct 5 ms 8560 KB Output is correct
17 Incorrect 4 ms 7604 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 255300 KB Output is correct
2 Correct 181 ms 255260 KB Output is correct
3 Correct 161 ms 255224 KB Output is correct
4 Correct 163 ms 255268 KB Output is correct
5 Correct 159 ms 255304 KB Output is correct
6 Correct 161 ms 255228 KB Output is correct
7 Correct 176 ms 255300 KB Output is correct
8 Correct 161 ms 255260 KB Output is correct
9 Correct 165 ms 255240 KB Output is correct
10 Correct 179 ms 255284 KB Output is correct
11 Correct 168 ms 255260 KB Output is correct
12 Correct 160 ms 255244 KB Output is correct

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7492 KB Output is correct
12 Correct 4 ms 7508 KB Output is correct
13 Correct 4 ms 7532 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Correct 5 ms 8560 KB Output is correct
17 Incorrect 4 ms 7604 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7492 KB Output is correct
12 Correct 4 ms 7508 KB Output is correct
13 Correct 4 ms 7532 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Correct 5 ms 8560 KB Output is correct
17 Incorrect 4 ms 7604 KB Output isn't correct
18 Halted 0 ms 0 KB -