oj.uz

Submission #405534

# Submission time Handle Problem Language Result Execution time Memory
405534 2021-05-16T14:09:29 Z sad Cigle (COI21_cigle) C++14
22 / 100
 172 ms 255364 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};
        dp[m][0]={0,1};
        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;
            }
            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];
            if(m==prf[re]-2)while(1)r++;
            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 1 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 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 1 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 7500 KB Output is correct
12 Correct 5 ms 7500 KB Output is correct
13 Correct 5 ms 7500 KB Output is correct
14 Correct 5 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 169 ms 255264 KB Output is correct
2 Correct 166 ms 255300 KB Output is correct
3 Correct 161 ms 255260 KB Output is correct
4 Correct 168 ms 255232 KB Output is correct
5 Correct 159 ms 255300 KB Output is correct
6 Correct 161 ms 255192 KB Output is correct
7 Correct 172 ms 255272 KB Output is correct
8 Correct 168 ms 255364 KB Output is correct
9 Correct 160 ms 255284 KB Output is correct
10 Correct 163 ms 255232 KB Output is correct
11 Correct 169 ms 255196 KB Output is correct
12 Correct 162 ms 255300 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 1 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 7500 KB Output is correct
12 Correct 5 ms 7500 KB Output is correct
13 Correct 5 ms 7500 KB Output is correct
14 Correct 5 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 1 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 1 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 5 ms 7500 KB Output is correct
13 Correct 5 ms 7500 KB Output is correct
14 Correct 5 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 -