oj.uz

Submission #887942

# Submission time Handle Problem Language Result Execution time Memory
887942 2023-12-15T14:44:35 Z 12345678 Dancing Elephants (IOI11_elephants) C++17
97 / 100
 9000 ms 26812 KB 
#include "elephants.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
using namespace std;
 
const int nx=150005, tx=390;
int n, c[nx], v[nx], l, cnt;
multiset<int> ms[tx];
vector<int> vl[tx];
vector<pair<int, int>> dp[tx];
 
void calc(int x)
{
    vl[x].resize(0);
    for (auto a:ms[x]) vl[x].push_back(a);
    dp[x].resize(vl[x].size());
    if (vl[x].size()==0) return;
    deque<int> dq;
    dq.push_back(INT_MAX);
    for (int i=vl[x].size()-1; i>=0; i--)
    {
        while (dq.size()>=2)
        {
            auto tmp=dq.back();
            dq.pop_back();
            if (vl[x][dq.back()]<=vl[x][i]+l) 
            {
                dq.push_back(tmp);
                break; 
            }
        }
        if (dq.back()==INT_MAX) 
        {
            dp[x][i].first=vl[x][i]+l;
            dp[x][i].second=1;
        }
        else
        {
            dp[x][i].first=dp[x][dq.back()].first;
            dp[x][i].second=dp[x][dq.back()].second+1;
        }
        dq.push_front(i);
        //if (cnt==5) cout<<x<<' '<<i<<' '<<vl[x][i]<<' '<<dp[x][i].first<<' '<<dp[x][i].second<<'\n';
    }
}
 
void build()
{
    vector<pair<int, int>> d(n);
    for (int i=0; i<n; i++) d[i].first=v[i], d[i].second=i;
    sort(d.begin(), d.end());
    for (int i=0; i<tx; i++) ms[i].clear();
    for (int i=0; i<n; i++) c[d[i].second]=i/tx, ms[i/tx].insert(d[i].first);
    for (int i=0; i<tx; i++) calc(i);
}
 
int query()
{
    int lst=-1, res=0;
    for (int i=0; i<tx; i++)
    {
        if (vl[i].empty()||lst>=vl[i][vl[i].size()-1]) continue;
        int idx=upper_bound(vl[i].begin(), vl[i].end(), lst)-vl[i].begin();
        res+=dp[i][idx].second;
        lst=dp[i][idx].first;
        //if (cnt==5) cout<<i<<' '<<res<<' '<<lst<<'\n';
    }
    return res;
}
 
void init(int N, int L, int X[])
{
    n=N; l=L;
    for (int i=0; i<n; i++) v[i]=X[i];
    build();
}
 
int update(int i, int y)
{
    if ((++cnt)%1000==0) 
    {
        v[i]=y;
        build();
        return query();
    }
    int loc=c[i];
    ms[loc].erase(ms[loc].find(v[i]));
    v[i]=y;
    calc(loc);
    for (int j=0; j<tx; j++)
    {
        if (j==tx-1)
        {
            ms[j].insert(y);
            c[i]=j;
            calc(j);
        }
        else if (!vl[j].empty()&&vl[j][vl[j].size()-1]>=y)
        {
            ms[j].insert(y);
            c[i]=j;
            calc(j);
            break;
        }
    }
    return query();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 659 ms 9964 KB Output is correct
8 Correct 695 ms 10356 KB Output is correct
9 Correct 762 ms 12480 KB Output is correct
10 Correct 738 ms 12204 KB Output is correct
11 Correct 739 ms 12224 KB Output is correct
12 Correct 1299 ms 13180 KB Output is correct
13 Correct 751 ms 12212 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 659 ms 9964 KB Output is correct
8 Correct 695 ms 10356 KB Output is correct
9 Correct 762 ms 12480 KB Output is correct
10 Correct 738 ms 12204 KB Output is correct
11 Correct 739 ms 12224 KB Output is correct
12 Correct 1299 ms 13180 KB Output is correct
13 Correct 751 ms 12212 KB Output is correct
14 Correct 1022 ms 10480 KB Output is correct
15 Correct 878 ms 10856 KB Output is correct
16 Correct 1981 ms 12972 KB Output is correct
17 Correct 2130 ms 14692 KB Output is correct
18 Correct 2218 ms 14656 KB Output is correct
19 Correct 1550 ms 13572 KB Output is correct
20 Correct 2121 ms 14660 KB Output is correct
21 Correct 2098 ms 14832 KB Output is correct
22 Correct 1229 ms 13568 KB Output is correct

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 659 ms 9964 KB Output is correct
8 Correct 695 ms 10356 KB Output is correct
9 Correct 762 ms 12480 KB Output is correct
10 Correct 738 ms 12204 KB Output is correct
11 Correct 739 ms 12224 KB Output is correct
12 Correct 1299 ms 13180 KB Output is correct
13 Correct 751 ms 12212 KB Output is correct
14 Correct 1022 ms 10480 KB Output is correct
15 Correct 878 ms 10856 KB Output is correct
16 Correct 1981 ms 12972 KB Output is correct
17 Correct 2130 ms 14692 KB Output is correct
18 Correct 2218 ms 14656 KB Output is correct
19 Correct 1550 ms 13572 KB Output is correct
20 Correct 2121 ms 14660 KB Output is correct
21 Correct 2098 ms 14832 KB Output is correct
22 Correct 1229 ms 13568 KB Output is correct
23 Correct 4633 ms 20956 KB Output is correct
24 Correct 4870 ms 20612 KB Output is correct
25 Correct 4166 ms 19680 KB Output is correct
26 Correct 4623 ms 18992 KB Output is correct
27 Correct 5501 ms 19136 KB Output is correct
28 Correct 2396 ms 11988 KB Output is correct
29 Correct 2295 ms 11992 KB Output is correct
30 Correct 2383 ms 11976 KB Output is correct
31 Correct 2320 ms 11868 KB Output is correct
32 Correct 4104 ms 23440 KB Output is correct
33 Correct 3803 ms 22768 KB Output is correct
34 Correct 4332 ms 23648 KB Output is correct
35 Correct 4680 ms 26812 KB Output is correct
36 Correct 5197 ms 23432 KB Output is correct
37 Correct 7536 ms 25744 KB Output is correct
38 Correct 4405 ms 22608 KB Output is correct
39 Correct 5278 ms 23696 KB Output is correct
40 Correct 4428 ms 22708 KB Output is correct
41 Correct 8026 ms 25780 KB Output is correct
42 Execution timed out 9006 ms 25996 KB Time limit exceeded
43 Halted 0 ms 0 KB -