oj.uz

Submission #378383

# Submission time Handle Problem Language Result Execution time Memory
378383 2021-03-16T15:58:43 Z smjleo Group Photo (JOI21_ho_t3) C++14
100 / 100
 1161 ms 856 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
using namespace std;
#define int long long
#define nl '\n'
#define io ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
mt19937 rng((unsigned)chrono::steady_clock::now().time_since_epoch().count());
const int mod = 1000000007, mod2 = 998244353;

// change this
const int N = 5005;

int n, h[N], fw[N], fw2[N], pos[N], dp[N];

void update(int x, int v) {
    for (; x<N; x+=x&(-x)) fw[x] += v; 
}
int sum(int x) {
    int res = 0;
    for(; x; x-=x&(-x)) res += fw[x];
    return res;
}

void update2(int x, int v) {
    for (; x<N; x+=x&(-x)) fw2[x] += v; 
}

int sum2(int x) {
    int res = 0;
    for(; x; x-=x&(-x)) res += fw2[x];
    return res;
}

signed main() {
    io;
    cin >> n;
    for (int i=1; i<=n; i++) {
        cin >> h[i];
        pos[h[i]] = i;
    }

    for (int i=1; i<=n; i++) {
        dp[i] = 1e18;

        int ans = 0;
        for (int j=1; j<=i; j++) {
            ans += sum(pos[j] - 1);
            update(pos[j], 1);
        }
        memset(fw2, 0, sizeof fw2);
        for (int j=0; j<i; j++) {
            // find dp
            dp[i] = min(dp[i], dp[j] + ans);
            // remove
            ans -= sum(n) - sum(pos[j+1]);
            ans -= sum2(n) - sum2(pos[j+1]);
            update(pos[j+1], -1);
            // add
            ans += sum(pos[j+1]);
            update2(pos[j+1], 1);
        }
    }

    cout << dp[n] << nl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 364 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 2 ms 364 KB Output is correct
24 Correct 2 ms 364 KB Output is correct
25 Correct 2 ms 364 KB Output is correct
26 Correct 3 ms 364 KB Output is correct
27 Correct 2 ms 364 KB Output is correct
28 Correct 2 ms 364 KB Output is correct
29 Correct 3 ms 364 KB Output is correct
30 Correct 2 ms 364 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 364 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 2 ms 364 KB Output is correct
24 Correct 2 ms 364 KB Output is correct
25 Correct 2 ms 364 KB Output is correct
26 Correct 3 ms 364 KB Output is correct
27 Correct 2 ms 364 KB Output is correct
28 Correct 2 ms 364 KB Output is correct
29 Correct 3 ms 364 KB Output is correct
30 Correct 2 ms 364 KB Output is correct
31 Correct 31 ms 492 KB Output is correct
32 Correct 27 ms 492 KB Output is correct
33 Correct 30 ms 492 KB Output is correct
34 Correct 27 ms 364 KB Output is correct
35 Correct 26 ms 492 KB Output is correct
36 Correct 25 ms 492 KB Output is correct
37 Correct 25 ms 620 KB Output is correct
38 Correct 25 ms 492 KB Output is correct
39 Correct 25 ms 492 KB Output is correct
40 Correct 27 ms 492 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 492 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 364 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 2 ms 364 KB Output is correct
24 Correct 2 ms 364 KB Output is correct
25 Correct 2 ms 364 KB Output is correct
26 Correct 3 ms 364 KB Output is correct
27 Correct 2 ms 364 KB Output is correct
28 Correct 2 ms 364 KB Output is correct
29 Correct 3 ms 364 KB Output is correct
30 Correct 2 ms 364 KB Output is correct
31 Correct 31 ms 492 KB Output is correct
32 Correct 27 ms 492 KB Output is correct
33 Correct 30 ms 492 KB Output is correct
34 Correct 27 ms 364 KB Output is correct
35 Correct 26 ms 492 KB Output is correct
36 Correct 25 ms 492 KB Output is correct
37 Correct 25 ms 620 KB Output is correct
38 Correct 25 ms 492 KB Output is correct
39 Correct 25 ms 492 KB Output is correct
40 Correct 27 ms 492 KB Output is correct
41 Correct 1100 ms 716 KB Output is correct
42 Correct 1161 ms 844 KB Output is correct
43 Correct 1156 ms 720 KB Output is correct
44 Correct 1142 ms 748 KB Output is correct
45 Correct 1120 ms 748 KB Output is correct
46 Correct 1149 ms 620 KB Output is correct
47 Correct 1145 ms 716 KB Output is correct
48 Correct 1100 ms 620 KB Output is correct
49 Correct 1158 ms 724 KB Output is correct
50 Correct 1113 ms 632 KB Output is correct
51 Correct 1133 ms 620 KB Output is correct
52 Correct 1110 ms 856 KB Output is correct
53 Correct 1100 ms 624 KB Output is correct
54 Correct 1091 ms 620 KB Output is correct
55 Correct 1107 ms 760 KB Output is correct