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Submission #467556

# Submission time Handle Problem Language Result Execution time Memory
467556 2021-08-23T15:18:29 Z MilosMilutinovic Exam (eJOI20_exam) C++14
26 / 100
 228 ms 2144 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) (x).begin(),(x).end()
#define inv(n) power((n), mod - 2)
#define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
#define fff(i,a,b) for (int (i) = (a); (i) <= b; (i)++)
#define bff(i,a,b) for (int (i) = (b)-1; (i) >= (a); (i)--)
#define bfff(i,a,b) for (int (i) = (b); (i) >= (a); (i)--)
#define sum_overflow(a,b) __builtin_add_overflow_p (a, b, (__typeof__ ((a) + (b))) 0)
#define mul_overflow(a,b) __builtin_mul_overflow_p (a, b, (__typeof__ ((a) + (b))) 0)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;

using namespace __gnu_pbds;
template <class T> using oset = tree<T, null_type,less<T>, rb_tree_tag,tree_order_statistics_node_update>;
template <class T> using omset = tree<T, null_type,less_equal<T>, rb_tree_tag,tree_order_statistics_node_update>;







//Note to self: Check for overflow

int n,bans;
vector<int> a,b;
set<vector<int>> setcina;

int calc(vector<int> niz)
{
    int cnt=0;
    ff(i,0,n)cnt+=(niz[i]==b[i]?1:0);
    return cnt;
}

void brutuj(vector<int> niz)
{
    if (setcina.find(niz)!=setcina.end())return;
    setcina.insert(niz);
    bans=max(bans,calc(niz));
    ff(l,0,n)
    {
        int mx=niz[l];
        ff(r,l+1,n)
        {
            mx=max(mx,niz[r]);
            auto novi=niz;
            fff(i,l,r)novi[i]=mx;
            brutuj(novi);
        }
    }
}

int rec[5005][5005];
bool was[5005][5005];
int dq(int l,int r)
{
    if(l>r)return 0;
    if(was[l][r])return rec[l][r];
    was[l][r]=1;

    int cnt=0;
    bfff(i,l,r)
    {
        cnt+=(a[r]==b[i]);
        rec[l][r]=max(rec[l][r],cnt+dq(l,i-1));
    }
    return rec[l][r];
}
int main()
{
    FAST;

    cin>>n;
    a.resize(n),b.resize(n);
    ff(i,0,n) cin>>a[i];
    ff(i,0,n) cin>>b[i];

    if(n<=10)
    {
        brutuj(a);
        cout<<bans;
        return 0;
    }

    if(*min_element(all(b))==*max_element(all(b)))
    {
        ff(i,0,n)
        {
            if(a[i]==b[i])
            {
                bff(j,0,i)
                {
                    if(a[j]>=a[i])break;
                    a[j]=a[i];
                }
                ff(j,i+1,n)
                {
                    if(a[j]>=a[i])break;
                    a[j]=a[i];
                }
            }
        }
        cout<<calc(a);
        return 0;
    }

    if(true || n<=5000)
    {
        cout<<dq(0,n-1);
        return 0;
    }

}

//Note to self: Check for overflow

Compilation message

exam.cpp: In function 'int calc(std::vector<int>)':
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:53:5: note: in expansion of macro 'ff'
   53 |     ff(i,0,n)cnt+=(niz[i]==b[i]?1:0);
      |     ^~
exam.cpp: In function 'void brutuj(std::vector<int>)':
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'l' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:62:5: note: in expansion of macro 'ff'
   62 |     ff(l,0,n)
      |     ^~
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'r' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:65:9: note: in expansion of macro 'ff'
   65 |         ff(r,l+1,n)
      |         ^~
exam.cpp:16:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   16 | #define fff(i,a,b) for (int (i) = (a); (i) <= b; (i)++)
      |                             ^
exam.cpp:69:13: note: in expansion of macro 'fff'
   69 |             fff(i,l,r)novi[i]=mx;
      |             ^~~
exam.cpp: In function 'int dq(int, int)':
exam.cpp:18:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   18 | #define bfff(i,a,b) for (int (i) = (b); (i) >= (a); (i)--)
      |                              ^
exam.cpp:84:5: note: in expansion of macro 'bfff'
   84 |     bfff(i,l,r)
      |     ^~~~
exam.cpp: In function 'int main()':
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:97:5: note: in expansion of macro 'ff'
   97 |     ff(i,0,n) cin>>a[i];
      |     ^~
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:98:5: note: in expansion of macro 'ff'
   98 |     ff(i,0,n) cin>>b[i];
      |     ^~
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:109:9: note: in expansion of macro 'ff'
  109 |         ff(i,0,n)
      |         ^~
exam.cpp:17:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   17 | #define bff(i,a,b) for (int (i) = (b)-1; (i) >= (a); (i)--)
      |                             ^
exam.cpp:113:17: note: in expansion of macro 'bff'
  113 |                 bff(j,0,i)
      |                 ^~~
exam.cpp:15:28: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   15 | #define ff(i,a,b) for (int (i) = (a); (i) < (b); (i)++)
      |                            ^
exam.cpp:118:17: note: in expansion of macro 'ff'
  118 |                 ff(j,i+1,n)
      |                 ^~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 228 ms 2144 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 6 ms 460 KB Output is correct
3 Correct 18 ms 1304 KB Output is correct
4 Correct 17 ms 1500 KB Output is correct
5 Correct 29 ms 1376 KB Output is correct
6 Correct 15 ms 1504 KB Output is correct
7 Correct 17 ms 1504 KB Output is correct
8 Correct 25 ms 1484 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 86 ms 748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 228 ms 2144 KB Output is correct
7 Incorrect 1 ms 204 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 228 ms 2144 KB Output is correct
7 Incorrect 1 ms 256 KB Output isn't correct
8 Halted 0 ms 0 KB -