oj.uz

Submission #653211

# Submission time Handle Problem Language Result Execution time Memory
653211 2022-10-26T08:16:20 Z Stickfish Group Photo (JOI21_ho_t3) C++17
100 / 100
 855 ms 460 KB 
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

struct bitr {
    void resize(int n) {
        t.resize(n);
        sz = n;
    }

    void add(int i, int x) {
        while (i < sz) {
            t[i] += x;
            i |= i + 1;
        }
    }

    int get(int i) {
        int ans = 0;
        while (i > -1) {
            ans += t[i];
            i &= i + 1;
            --i;
        }
        return ans;
    }

    int operator()(int l, int r) {
        return get(r - 1) - get(l - 1);
    }
    
 private:
     int sz;
     vector<int> t;
};

const int MAXN = 5001;
int a[MAXN];
int ra[MAXN];
int dp_[MAXN];
int* dp = dp_ + 1;

signed main() {
    int n;
    cin >> n;
    for (int i = 0; i < n; ++i)
        cin >> a[i];
    for (int i = 0; i < n; ++i)
        ra[--a[i]] = i;
    for (int i = 0; i < n; ++i)
        dp[i] = MAXN * MAXN;
    for (int i = -1; i < n; ++i) {
        bitr used;
        bitr nonused;
        used.resize(n);
        nonused.resize(n);
        for (int j = i + 1; j < n; ++j) {
            nonused.add(ra[j], 1);
        }
        int add = 0;
        for (int j = i + 1; j < n; ++j) {
            nonused.add(ra[j], -1);
            add += nonused.get(ra[j] - 1);
            add -= used(ra[j], n);
            add += used.get(ra[j]);
            used.add(ra[j], 1);
            dp[j] = min(dp[j], dp[i] + add);
        }
    }
    cout << dp[n - 1] << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 260 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 260 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 2 ms 300 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 2 ms 212 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 260 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 2 ms 300 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 2 ms 212 KB Output is correct
31 Correct 16 ms 212 KB Output is correct
32 Correct 17 ms 212 KB Output is correct
33 Correct 17 ms 212 KB Output is correct
34 Correct 15 ms 324 KB Output is correct
35 Correct 16 ms 212 KB Output is correct
36 Correct 15 ms 320 KB Output is correct
37 Correct 16 ms 212 KB Output is correct
38 Correct 16 ms 324 KB Output is correct
39 Correct 17 ms 212 KB Output is correct
40 Correct 16 ms 212 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 260 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 300 KB Output is correct
27 Correct 1 ms 308 KB Output is correct
28 Correct 2 ms 300 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 2 ms 212 KB Output is correct
31 Correct 16 ms 212 KB Output is correct
32 Correct 17 ms 212 KB Output is correct
33 Correct 17 ms 212 KB Output is correct
34 Correct 15 ms 324 KB Output is correct
35 Correct 16 ms 212 KB Output is correct
36 Correct 15 ms 320 KB Output is correct
37 Correct 16 ms 212 KB Output is correct
38 Correct 16 ms 324 KB Output is correct
39 Correct 17 ms 212 KB Output is correct
40 Correct 16 ms 212 KB Output is correct
41 Correct 846 ms 400 KB Output is correct
42 Correct 843 ms 400 KB Output is correct
43 Correct 855 ms 412 KB Output is correct
44 Correct 849 ms 412 KB Output is correct
45 Correct 849 ms 340 KB Output is correct
46 Correct 837 ms 396 KB Output is correct
47 Correct 822 ms 460 KB Output is correct
48 Correct 823 ms 460 KB Output is correct
49 Correct 832 ms 400 KB Output is correct
50 Correct 838 ms 400 KB Output is correct
51 Correct 835 ms 416 KB Output is correct
52 Correct 826 ms 340 KB Output is correct
53 Correct 835 ms 396 KB Output is correct
54 Correct 837 ms 340 KB Output is correct
55 Correct 832 ms 400 KB Output is correct