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Submission #469032

# Submission time Handle Problem Language Result Execution time Memory
469032 2021-08-30T12:51:50 Z kderylo Exam (eJOI20_exam) C++17
65 / 100
 188 ms 165596 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];
    }
    wyznacz_przedzial(ile);
    if(ile<=5000)
    {
        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
    {
        int takie_same=tab2[1];
        bool xyz=true;
        for(int i=2;i<=ile;i++)
        {
            if(tab2[i]!=takie_same)
            {
                xyz=false;
                break;
            }
        }
        if(xyz==true)
        {
            int res=0;
            for(int i=1;i<=ile;i++)
            {
                if(tab[i]==takie_same)
                {
                    res+=przedzialy[i][1]-przedzialy[i][0]+1;
                }
            }
            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 13 ms 12876 KB Output is correct
2 Incorrect 6 ms 720 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 320 KB Output is correct
2 Correct 5 ms 5836 KB Output is correct
3 Correct 37 ms 39920 KB Output is correct
4 Correct 174 ms 157636 KB Output is correct
5 Correct 172 ms 165544 KB Output is correct
6 Correct 176 ms 165592 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 2124 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 320 KB Output is correct
8 Correct 5 ms 5836 KB Output is correct
9 Correct 37 ms 39920 KB Output is correct
10 Correct 174 ms 157636 KB Output is correct
11 Correct 172 ms 165544 KB Output is correct
12 Correct 176 ms 165592 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 2124 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 2112 KB Output is correct
22 Correct 15 ms 14660 KB Output is correct
23 Correct 164 ms 118692 KB Output is correct
24 Correct 170 ms 118792 KB Output is correct
25 Correct 162 ms 119420 KB Output is correct
26 Correct 166 ms 125960 KB Output is correct
27 Correct 175 ms 136760 KB Output is correct
28 Correct 176 ms 153660 KB Output is correct
29 Correct 180 ms 165556 KB Output is correct
30 Correct 188 ms 165548 KB Output is correct
31 Correct 183 ms 165596 KB Output is correct
32 Correct 170 ms 143184 KB Output is correct