oj.uz

Submission #462429

# Submission time Handle Problem Language Result Execution time Memory
462429 2021-08-10T14:10:53 Z idas Exam (eJOI20_exam) C++11
0 / 100
 1000 ms 6268 KB 
#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr)
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define SZ(x) ((int)((x).size()))
#define LE(vec) vec[vec.size()-1]
#define TSTS int t; cin >> t; while(t--)solve()

const int INF = 1e9;
const long long LINF = 1e18;
const long double PI = asin(1)*2;
const int MOD = 1e9+7;

using namespace std;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef map<int, int> mii;
typedef long long ll;
typedef long double ld;

void setIO()
{
    FAST_IO;
}

void setIO (string s)
{
    setIO();
 	freopen((s+".in").c_str(),"r",stdin);
 	freopen((s+".out").c_str(),"w",stdout);
}

const int N=5e3+10;
int n, a[N], b[N], t[2*N], dp[N], val[N][N];

void build()
{
    for(int i=n-1; i>=0; i--) t[i]=max(t[i<<1], t[i<<1|1]);
}

int get(int l, int r)
{
    int ret=0;
    for(l+=n, r+=n; l<r; l>>=1, r>>=1){
        if(l&1) ret=max(ret, t[l++]);
        if(r&1) ret=max(ret, t[--r]);
    }
    return ret;
}

int main()
{
    setIO();
    cin >> n;
    FOR(i, 0, n)
    {
        cin >> a[i];
        t[i+n]=a[i];
    }
    FOR(i, 0, n) cin >> b[i];
    build();

    FOR(i, 0, n)
    {
        FOR(j, i, n)
        {
            int gt=get(i, j+1), tot=0;
            FOR(x, i, j+1)
            {
                if(b[x]==gt) tot++;
            }
            val[i][j]=tot;
        }
    }

    FOR(i, 1, n+1)
    {
        dp[i]=max(dp[i], dp[i-1]);
        FOR(j, 1, i+1)
        {
            int gt=val[j-1][i-1];
            dp[i]=max(dp[i], dp[j-1]+gt);
        }
    }

    cout << dp[n];
}

Compilation message

exam.cpp: In function 'void setIO(std::string)':
exam.cpp:32:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |   freopen((s+".in").c_str(),"r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
exam.cpp:33:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   freopen((s+".out").c_str(),"w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 332 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 231 ms 6268 KB Output is correct
2 Runtime error 5 ms 440 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1094 ms 2048 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 332 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 316 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Incorrect 1 ms 332 KB Output isn't correct
6 Halted 0 ms 0 KB -