oj.uz

답안 #405528

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
405528 2021-05-16T14:03:09 Z sad Cigle (COI21_cigle) C++14
22 / 100
 197 ms 255312 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];
        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]-1<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;
                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

# 결과 실행 시간 메모리 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 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

# 결과 실행 시간 메모리 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 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 7 ms 7500 KB Output is correct
12 Correct 5 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 7520 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

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 255212 KB Output is correct
2 Correct 162 ms 255300 KB Output is correct
3 Correct 194 ms 255300 KB Output is correct
4 Correct 164 ms 255252 KB Output is correct
5 Correct 162 ms 255300 KB Output is correct
6 Correct 167 ms 255288 KB Output is correct
7 Correct 174 ms 255296 KB Output is correct
8 Correct 162 ms 255300 KB Output is correct
9 Correct 160 ms 255216 KB Output is correct
10 Correct 179 ms 255260 KB Output is correct
11 Correct 197 ms 255300 KB Output is correct
12 Correct 165 ms 255312 KB Output is correct

Subtask #4
0 / 15.0

# 결과 실행 시간 메모리 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 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 7 ms 7500 KB Output is correct
12 Correct 5 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 7520 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

# 결과 실행 시간 메모리 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 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 7 ms 7500 KB Output is correct
12 Correct 5 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 7520 KB Output is correct
16 Incorrect 5 ms 8524 KB Output isn't correct
17 Halted 0 ms 0 KB -