oj.uz

Submission #915899

# Submission time Handle Problem Language Result Execution time Memory
915899 2024-01-24T21:16:12 Z EJIC_B_KEDAX Group Photo (JOI21_ho_t3) C++17
100 / 100
 147 ms 199664 KB 
#ifdef LOCAL
    # define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <immintrin.h>

#ifndef LOCAL
    // #pragma GCC optimize("O3")
    // #pragma GCC optimize("Ofast")
    // #pragma GCC optimize("unroll-loops")
    // #pragma GCC target("avx,avx2,bmi,bmi2,popcnt,lzcnt,sse,sse2,sse3,ssse3,mmx")
#endif
using namespace std;
using ll = long long;
using ld = long double;
# define x first
# define y second
# define all(x) x.begin(), x.end()
# define rall(x) x.rbegin(), x.rend()

mt19937_64 mt(time(0));

void solve();
void init();

int32_t main() {
#ifndef LOCAL
    cin.tie(nullptr)->sync_with_stdio(false);
#endif
    cout << fixed << setprecision(30);
    init();
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
}

void init() {}

const int N = 5050;
int dp1[N][N], dp2[N][N], dp[N];
pair<int, int> a[N];

void solve() {
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i].x;
        a[i].y = i;
    }
    sort(a, a + n, greater<>());
    for (int i = 0; i < n; i++) {
        dp2[i][i] = 0;
        for (int j = i - 1; j >= 0; j--) {
            if (a[j].y > a[i].y) {
                dp2[i][j] = dp2[i][j + 1] + 1;
            } else {
                dp2[i][j] = dp2[i][j + 1];
            }
        }
    }
    for (int i = 0; i < n; i++) {
        dp1[i][i] = 0;
        for (int j = i + 1; j < n; j++) {
            dp1[i][j] = dp1[i][j - 1] + dp2[j][i];
        }
    }
    int off = n * (n - 1) / 2 - dp1[0][n - 1];
    for (int i = 0; i < n; i++) {
        for (int j = i; j < n; j++) {
            dp1[i][j] = 2 * dp1[i][j] - (j - i) * (j - i + 1) / 2;
        }
    }
    for (int i = 1; i <= n; i++) {
        for (int j = i - 1; j >= 0; j--) {
            dp[i] = min(dp[i], dp[j] + dp1[j][i - 1]);
        }
    }
    cout << off + dp[n] << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 2 ms 10588 KB Output is correct
23 Correct 2 ms 10588 KB Output is correct
24 Correct 2 ms 10588 KB Output is correct
25 Correct 2 ms 10588 KB Output is correct
26 Correct 2 ms 10588 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 10588 KB Output is correct
29 Correct 2 ms 10588 KB Output is correct
30 Correct 2 ms 10588 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 2 ms 10588 KB Output is correct
23 Correct 2 ms 10588 KB Output is correct
24 Correct 2 ms 10588 KB Output is correct
25 Correct 2 ms 10588 KB Output is correct
26 Correct 2 ms 10588 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 10588 KB Output is correct
29 Correct 2 ms 10588 KB Output is correct
30 Correct 2 ms 10588 KB Output is correct
31 Correct 7 ms 35160 KB Output is correct
32 Correct 8 ms 35168 KB Output is correct
33 Correct 7 ms 35168 KB Output is correct
34 Correct 6 ms 35164 KB Output is correct
35 Correct 7 ms 35384 KB Output is correct
36 Correct 6 ms 35164 KB Output is correct
37 Correct 7 ms 35356 KB Output is correct
38 Correct 7 ms 35164 KB Output is correct
39 Correct 7 ms 35164 KB Output is correct
40 Correct 7 ms 35164 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 2 ms 10588 KB Output is correct
22 Correct 2 ms 10588 KB Output is correct
23 Correct 2 ms 10588 KB Output is correct
24 Correct 2 ms 10588 KB Output is correct
25 Correct 2 ms 10588 KB Output is correct
26 Correct 2 ms 10588 KB Output is correct
27 Correct 2 ms 10588 KB Output is correct
28 Correct 2 ms 10588 KB Output is correct
29 Correct 2 ms 10588 KB Output is correct
30 Correct 2 ms 10588 KB Output is correct
31 Correct 7 ms 35160 KB Output is correct
32 Correct 8 ms 35168 KB Output is correct
33 Correct 7 ms 35168 KB Output is correct
34 Correct 6 ms 35164 KB Output is correct
35 Correct 7 ms 35384 KB Output is correct
36 Correct 6 ms 35164 KB Output is correct
37 Correct 7 ms 35356 KB Output is correct
38 Correct 7 ms 35164 KB Output is correct
39 Correct 7 ms 35164 KB Output is correct
40 Correct 7 ms 35164 KB Output is correct
41 Correct 145 ms 199508 KB Output is correct
42 Correct 135 ms 199436 KB Output is correct
43 Correct 131 ms 199508 KB Output is correct
44 Correct 135 ms 199560 KB Output is correct
45 Correct 134 ms 199504 KB Output is correct
46 Correct 146 ms 199504 KB Output is correct
47 Correct 134 ms 199368 KB Output is correct
48 Correct 139 ms 199664 KB Output is correct
49 Correct 138 ms 199392 KB Output is correct
50 Correct 136 ms 199408 KB Output is correct
51 Correct 136 ms 199508 KB Output is correct
52 Correct 147 ms 199524 KB Output is correct
53 Correct 132 ms 199420 KB Output is correct
54 Correct 134 ms 199508 KB Output is correct
55 Correct 134 ms 199544 KB Output is correct