oj.uz

Submission #535730

# Submission time Handle Problem Language Result Execution time Memory
535730 2022-03-11T03:50:11 Z sam571128 Group Photo (JOI21_ho_t3) C++17
64 / 100
 18 ms 5708 KB 
#include <bits/stdc++.h>

#define int long long
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

const int N = 1e3+5;
int bit[N][2], inv[N][N];

void update(int idx, int pos, int val){
    while(pos < N){
        bit[pos][idx] += val;
        pos += pos&-pos;
    }
}

int query(int idx, int pos){
    int res = 0;
    while(pos){
        res += bit[pos][idx];
        pos -= pos&-pos;
    }
    return res;
}

signed main(){
    fastio
    int n;
    cin >> n;
    int pos[n+1] = {};

    for(int i = 1;i <= n;i++){
        int x;
        cin >> x;
        pos[x] = i;
    }

    int arr[n+1];
    iota(arr,arr+n+1,0);
    for(int i = 1;i <= n;i++){
        arr[i] = pos[arr[i]];
    }

    for(int i = 1;i <= n;i++){
        for(int j = 0;j <= n;j++){
            bit[j][0] = 0;
        }
        for(int j = i;j <= n;j++){
            inv[i][j] = inv[i][j-1] + query(0,arr[j]) + query(1,N-1) - query(1,arr[j]);
            update(0,arr[j],1); 
        }
        update(1,arr[i],1);
    }

    int dp[n+1] = {};
    fill(dp+1,dp+n+1,1e18);

    for(int i = 1;i <= n;i++){
        for(int j = 0;j < i;j++){
            dp[i] = min(dp[i],dp[j] + inv[j+1][i]);
            //inv => inversions after reverse
        }
    }

    cout << dp[n] << "\n";
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 2 ms 1236 KB Output is correct
22 Correct 2 ms 1236 KB Output is correct
23 Correct 2 ms 1236 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 2 ms 1236 KB Output is correct
27 Correct 2 ms 1236 KB Output is correct
28 Correct 2 ms 1236 KB Output is correct
29 Correct 2 ms 1236 KB Output is correct
30 Correct 2 ms 1236 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 2 ms 1236 KB Output is correct
22 Correct 2 ms 1236 KB Output is correct
23 Correct 2 ms 1236 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 2 ms 1236 KB Output is correct
27 Correct 2 ms 1236 KB Output is correct
28 Correct 2 ms 1236 KB Output is correct
29 Correct 2 ms 1236 KB Output is correct
30 Correct 2 ms 1236 KB Output is correct
31 Correct 14 ms 5632 KB Output is correct
32 Correct 14 ms 5588 KB Output is correct
33 Correct 13 ms 5584 KB Output is correct
34 Correct 18 ms 5708 KB Output is correct
35 Correct 15 ms 5588 KB Output is correct
36 Correct 14 ms 5696 KB Output is correct
37 Correct 15 ms 5656 KB Output is correct
38 Correct 12 ms 5704 KB Output is correct
39 Correct 13 ms 5580 KB Output is correct
40 Correct 13 ms 5580 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 2 ms 1236 KB Output is correct
22 Correct 2 ms 1236 KB Output is correct
23 Correct 2 ms 1236 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1236 KB Output is correct
26 Correct 2 ms 1236 KB Output is correct
27 Correct 2 ms 1236 KB Output is correct
28 Correct 2 ms 1236 KB Output is correct
29 Correct 2 ms 1236 KB Output is correct
30 Correct 2 ms 1236 KB Output is correct
31 Correct 14 ms 5632 KB Output is correct
32 Correct 14 ms 5588 KB Output is correct
33 Correct 13 ms 5584 KB Output is correct
34 Correct 18 ms 5708 KB Output is correct
35 Correct 15 ms 5588 KB Output is correct
36 Correct 14 ms 5696 KB Output is correct
37 Correct 15 ms 5656 KB Output is correct
38 Correct 12 ms 5704 KB Output is correct
39 Correct 13 ms 5580 KB Output is correct
40 Correct 13 ms 5580 KB Output is correct
41 Runtime error 1 ms 644 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -