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Submission #468995

# Submission time Handle Problem Language Result Execution time Memory
468995 2021-08-30T11:05:19 Z kderylo Exam (eJOI20_exam) C++17
65 / 100
 183 ms 165616 KB 
#include <iostream>
#include <vector>
using namespace std;
const int stala=1e5+10;
const int stala2=5010;
int tab[stala];
int tab2[stala];
int przedzialy[stala][2];
int dp[stala2][stala2];
int pref[stala2][stala2];
vector<int>wektor;
vector<int>wektor2;
void wyznacz_przedzial(int ile)
{
    for(int i=1;i<=ile;i++)
    {
        while(!wektor.empty()&&wektor.back()<=tab[i])
        {
            przedzialy[wektor2.back()][1]=i-1;
            wektor.pop_back();
            wektor2.pop_back();
        }
        wektor.push_back(tab[i]);
        wektor2.push_back(i);
    }
    while(!wektor.empty())
    {
        przedzialy[wektor2.back()][1]=ile;
        wektor.pop_back();
        wektor2.pop_back();
    }
    for(int i=ile;i>=1;i--)
    {
        while(!wektor.empty()&&wektor.back()<=tab[i])
        {
            przedzialy[wektor2.back()][0]=i+1;
            wektor.pop_back();
            wektor2.pop_back();
        }
        wektor.push_back(tab[i]);
        wektor2.push_back(i);
    }
    while(!wektor.empty())
    {
        przedzialy[wektor2.back()][0]=1;
        wektor.pop_back();
        wektor2.pop_back();
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ile;
    cin>>ile;
    for(int i=1;i<=ile;i++)
    {
        cin>>tab[i];
    }
    for(int i=1;i<=ile;i++)
    {
        cin>>tab2[i];
    }
    if(ile<=5000)
    {
        wyznacz_przedzial(ile);
        for(int i=1;i<=ile;i++)
        {
            for(int j=1;j<=ile;j++)
            {
                if(przedzialy[j][0]<=i&&i<=przedzialy[j][1])
                {
                    dp[i][j]=max(dp[i-1][j],pref[i-1][j-1]);
                    if(tab[j]==tab2[i])
                    {
                        dp[i][j]++;
                    }
                }
                pref[i][j]=max(pref[i][j-1],dp[i][j]);
            }
        }
        int res=0;
        for(int i=1;i<=ile;i++)
        {
            res=max(res,dp[ile][i]);
        }
        cout<<res;
    }
    else
    {
        cout<<"0";
    }


    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12896 KB Output is correct
2 Incorrect 6 ms 788 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 4 ms 5836 KB Output is correct
3 Correct 35 ms 39960 KB Output is correct
4 Correct 156 ms 157704 KB Output is correct
5 Correct 176 ms 165472 KB Output is correct
6 Correct 168 ms 165616 KB Output is correct

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 460 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 1 ms 1100 KB Output is correct
10 Correct 2 ms 2124 KB Output is correct
11 Correct 2 ms 2124 KB Output is correct
12 Correct 2 ms 2120 KB Output is correct
13 Correct 2 ms 2124 KB Output is correct
14 Correct 2 ms 2124 KB Output is correct

Subtask #6
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 4 ms 5836 KB Output is correct
9 Correct 35 ms 39960 KB Output is correct
10 Correct 156 ms 157704 KB Output is correct
11 Correct 176 ms 165472 KB Output is correct
12 Correct 168 ms 165616 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 588 KB Output is correct
15 Correct 1 ms 1100 KB Output is correct
16 Correct 2 ms 2124 KB Output is correct
17 Correct 2 ms 2124 KB Output is correct
18 Correct 2 ms 2120 KB Output is correct
19 Correct 2 ms 2124 KB Output is correct
20 Correct 2 ms 2124 KB Output is correct
21 Correct 2 ms 2124 KB Output is correct
22 Correct 12 ms 14668 KB Output is correct
23 Correct 157 ms 118616 KB Output is correct
24 Correct 157 ms 118804 KB Output is correct
25 Correct 157 ms 119504 KB Output is correct
26 Correct 164 ms 126020 KB Output is correct
27 Correct 168 ms 136736 KB Output is correct
28 Correct 170 ms 153668 KB Output is correct
29 Correct 178 ms 165436 KB Output is correct
30 Correct 183 ms 165456 KB Output is correct
31 Correct 172 ms 165536 KB Output is correct
32 Correct 168 ms 143044 KB Output is correct