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Submission #632193

# Submission time Handle Problem Language Result Execution time Memory
632193 2022-08-19T15:38:51 Z Ooops_sorry Group Photo (JOI21_ho_t3) C++14
100 / 100
 420 ms 420 KB 
#include<bits/stdc++.h>

using namespace std;

mt19937 rnd(51);

#define ll long long
#define pb push_back
#define ld long double

const int INF = 1e9;

struct Fenwick {
    vector<int> t;
    Fenwick(int n) {
        t.resize(n);
    }
    void inc(int i, int d) {
        for (; i < t.size(); i = (i | (i + 1))) {
            t[i] += d;
        }
    }
    int get(int r) {
        int ans = 0;
        for (; r >= 0; r = (r & (r + 1)) - 1) {
            ans += t[r];
        }
        return ans;
    }
};

signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif // LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> a(n), dp(n + 1, INF), pos(n);
    dp[0] = 0;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        a[i]--;
    }
    //dp[i] - answer for the prefix
    for (int i = 0; i < n; i++) {
        int ind = 0;
        Fenwick t(n - i);
        for (int j = 0; j < n; j++) {
            if (a[j] < i) continue;
            pos[a[j] - i] = ind++;
        }
        int add = 0;
        for (int j = 0; j < n - i; j++) {
            add += pos[j] - j;
            add += t.get(pos[j]);
            dp[j + i + 1] = min(dp[j + i + 1], dp[i] + add);
            t.inc(pos[j], 1);
        }
    }
    cout << dp[n] << endl;
    return 0;
}

Compilation message

Main.cpp: In member function 'void Fenwick::inc(int, int)':
Main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (; i < t.size(); i = (i | (i + 1))) {
      |                ~~^~~~~~~~~~

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 324 KB Output is correct
4 Correct 1 ms 288 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 1 ms 212 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 324 KB Output is correct
4 Correct 1 ms 288 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 328 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 324 KB Output is correct
4 Correct 1 ms 288 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 328 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 340 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 324 KB Output is correct
4 Correct 1 ms 288 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 328 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 10 ms 340 KB Output is correct
32 Correct 11 ms 356 KB Output is correct
33 Correct 10 ms 340 KB Output is correct
34 Correct 10 ms 340 KB Output is correct
35 Correct 10 ms 340 KB Output is correct
36 Correct 10 ms 340 KB Output is correct
37 Correct 10 ms 320 KB Output is correct
38 Correct 11 ms 340 KB Output is correct
39 Correct 9 ms 340 KB Output is correct
40 Correct 10 ms 340 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 324 KB Output is correct
4 Correct 1 ms 288 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 328 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 10 ms 340 KB Output is correct
32 Correct 11 ms 356 KB Output is correct
33 Correct 10 ms 340 KB Output is correct
34 Correct 10 ms 340 KB Output is correct
35 Correct 10 ms 340 KB Output is correct
36 Correct 10 ms 340 KB Output is correct
37 Correct 10 ms 320 KB Output is correct
38 Correct 11 ms 340 KB Output is correct
39 Correct 9 ms 340 KB Output is correct
40 Correct 10 ms 340 KB Output is correct
41 Correct 392 ms 412 KB Output is correct
42 Correct 416 ms 404 KB Output is correct
43 Correct 394 ms 340 KB Output is correct
44 Correct 420 ms 420 KB Output is correct
45 Correct 404 ms 408 KB Output is correct
46 Correct 390 ms 408 KB Output is correct
47 Correct 408 ms 412 KB Output is correct
48 Correct 390 ms 408 KB Output is correct
49 Correct 414 ms 408 KB Output is correct
50 Correct 395 ms 404 KB Output is correct
51 Correct 420 ms 408 KB Output is correct
52 Correct 395 ms 408 KB Output is correct
53 Correct 410 ms 404 KB Output is correct
54 Correct 388 ms 408 KB Output is correct
55 Correct 418 ms 412 KB Output is correct