oj.uz

Submission #405539

# Submission time Handle Problem Language Result Execution time Memory
405539 2021-05-16T14:12:46 Z sad Cigle (COI21_cigle) C++14
22 / 100
 199 ms 255320 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};
        mxdp[m][1]={dp[m][1].fi,1};
        for(int i=2;i<m;i++)
        {

            if(dp[m][i].fi>mxdp[m][i-1].fi)
            {
                mxdp[m][i]={dp[m][i].fi,i};continue;
            }
            mxdp[m][i]=mxdp[m][i-1];
        }
        dp[m+1][m]=mxdp[m][m-1];
        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];
            z.fi+=rw[prf[re]-2][m][r];
            if(z.fi>mx)
            {
                dp[r][m]=z;
                ans=max(ans,z.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 2 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 2 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 2 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 2 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7500 KB Output is correct
12 Correct 4 ms 7500 KB Output is correct
13 Correct 4 ms 7500 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Incorrect 5 ms 8524 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 161 ms 255300 KB Output is correct
2 Correct 189 ms 255296 KB Output is correct
3 Correct 162 ms 255256 KB Output is correct
4 Correct 164 ms 255252 KB Output is correct
5 Correct 165 ms 255212 KB Output is correct
6 Correct 184 ms 255268 KB Output is correct
7 Correct 166 ms 255272 KB Output is correct
8 Correct 167 ms 255320 KB Output is correct
9 Correct 162 ms 255300 KB Output is correct
10 Correct 160 ms 255248 KB Output is correct
11 Correct 162 ms 255272 KB Output is correct
12 Correct 199 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 2 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 2 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7500 KB Output is correct
12 Correct 4 ms 7500 KB Output is correct
13 Correct 4 ms 7500 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Incorrect 5 ms 8524 KB Output isn't correct
17 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 2 ms 844 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 2 ms 972 KB Output is correct
10 Correct 4 ms 7500 KB Output is correct
11 Correct 4 ms 7500 KB Output is correct
12 Correct 4 ms 7500 KB Output is correct
13 Correct 4 ms 7500 KB Output is correct
14 Correct 4 ms 7500 KB Output is correct
15 Correct 4 ms 7500 KB Output is correct
16 Incorrect 5 ms 8524 KB Output isn't correct
17 Halted 0 ms 0 KB -