oj.uz

Submission #405547

# Submission time Handle Problem Language Result Execution time Memory
405547 2021-05-16T14:18:07 Z sad Cigle (COI21_cigle) C++14
22 / 100
 198 ms 255428 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];ans=max(ans,dp[m+1][m].fi);
        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,mx);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,mx);
            continue;
        }
    }
    cout<<ans;

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

Compilation message

cigle.cpp: In function 'int main()':
cigle.cpp:72:17: warning: unused variable 'last' [-Wunused-variable]
   72 |             int last=dp[r-1][m].se;
      |                 ^~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 844 KB Output is correct
2 Correct 2 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 1100 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 2 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 1100 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 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 Correct 5 ms 8520 KB Output is correct
17 Incorrect 5 ms 7500 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 163 ms 255324 KB Output is correct
2 Correct 160 ms 255232 KB Output is correct
3 Correct 161 ms 255264 KB Output is correct
4 Correct 166 ms 255428 KB Output is correct
5 Correct 188 ms 255284 KB Output is correct
6 Correct 163 ms 255260 KB Output is correct
7 Correct 163 ms 255300 KB Output is correct
8 Correct 198 ms 255196 KB Output is correct
9 Correct 180 ms 255208 KB Output is correct
10 Correct 181 ms 255232 KB Output is correct
11 Correct 164 ms 255232 KB Output is correct
12 Correct 177 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 2 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 1100 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 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 Correct 5 ms 8520 KB Output is correct
17 Incorrect 5 ms 7500 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 2 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 1100 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 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 Correct 5 ms 8520 KB Output is correct
17 Incorrect 5 ms 7500 KB Output isn't correct
18 Halted 0 ms 0 KB -