oj.uz

Submission #553838

# Submission time Handle Problem Language Result Execution time Memory
553838 2022-04-27T07:18:32 Z andrei_boaca Group Photo (JOI21_ho_t3) C++17
100 / 100
 1004 ms 67660 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("fast-math")
using namespace std;
typedef long long ll;
int v[5005],n,dp[5005],nrinv[5005][5005],poz[5005],aib[5005],curpoz[5005];
int lsb(int x)
{
    return x&(-x);
}
void update(int poz,int val)
{
    for(int i=poz;i<=n;i+=lsb(i))
        aib[i]+=val;
}
int suma(int poz)
{
    int rez=0;
    for(int i=poz;i>=1;i-=lsb(i))
        rez+=aib[i];
    return rez;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i];
        poz[v[i]]=i;
    }
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            aib[j]=0;
        int inv=0;
        for(int j=i;j<=n;j++)
        {
            int p=poz[j];
            inv+=suma(p);
            update(p,+1);
            nrinv[i][j]=inv;
        }
    }
    for(int k=n;k>=1;k--)
    {
        if(k==n)
        {
            dp[k]=0;
            continue;
        }
        /*vector<int> p;
        for(int i=1;i<=n;i++)
            if(v[i]<=k)
                p.push_back(v[i]);*/
        for(int i=1;i<=n;i++)
            aib[i]=0;
        int lg=0;
        for(int i=1;i<=n;i++)
            if(v[i]>=k)
            {
                lg++;
                curpoz[v[i]]=lg;
                update(lg,+1);
            }
        dp[k]=2e9;
        int need=0;
        for(int i=n;i>=k;i--)
        {
            int val=need+nrinv[k][i]+dp[i+1];
            dp[k]=min(dp[k],val);
            int st=suma(curpoz[i]-1);
            st=curpoz[i]-1-st;
            need-=st;
            int dr=suma(lg)-suma(curpoz[i]);
            need+=dr;
            update(curpoz[i],-1);
        }
    }
    cout<<dp[1];
    return 0;
}

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 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 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 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 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 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1108 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1232 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 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 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1108 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1232 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1236 KB Output is correct
31 Correct 22 ms 4820 KB Output is correct
32 Correct 23 ms 4732 KB Output is correct
33 Correct 24 ms 4808 KB Output is correct
34 Correct 25 ms 4820 KB Output is correct
35 Correct 22 ms 4820 KB Output is correct
36 Correct 23 ms 4812 KB Output is correct
37 Correct 23 ms 4820 KB Output is correct
38 Correct 23 ms 4784 KB Output is correct
39 Correct 22 ms 4844 KB Output is correct
40 Correct 23 ms 4736 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 2 ms 1108 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1228 KB Output is correct
25 Correct 2 ms 1232 KB Output is correct
26 Correct 2 ms 1228 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1236 KB Output is correct
31 Correct 22 ms 4820 KB Output is correct
32 Correct 23 ms 4732 KB Output is correct
33 Correct 24 ms 4808 KB Output is correct
34 Correct 25 ms 4820 KB Output is correct
35 Correct 22 ms 4820 KB Output is correct
36 Correct 23 ms 4812 KB Output is correct
37 Correct 23 ms 4820 KB Output is correct
38 Correct 23 ms 4784 KB Output is correct
39 Correct 22 ms 4844 KB Output is correct
40 Correct 23 ms 4736 KB Output is correct
41 Correct 991 ms 67296 KB Output is correct
42 Correct 1004 ms 67380 KB Output is correct
43 Correct 975 ms 67528 KB Output is correct
44 Correct 979 ms 67660 KB Output is correct
45 Correct 986 ms 67512 KB Output is correct
46 Correct 987 ms 67436 KB Output is correct
47 Correct 992 ms 67416 KB Output is correct
48 Correct 985 ms 67456 KB Output is correct
49 Correct 985 ms 67388 KB Output is correct
50 Correct 981 ms 67484 KB Output is correct
51 Correct 971 ms 67408 KB Output is correct
52 Correct 978 ms 67468 KB Output is correct
53 Correct 975 ms 67404 KB Output is correct
54 Correct 972 ms 67524 KB Output is correct
55 Correct 983 ms 67460 KB Output is correct