oj.uz

Submission #754100

# Submission time Handle Problem Language Result Execution time Memory
754100 2023-06-06T17:07:55 Z nicksms Dancing Elephants (IOI11_elephants) C++17
100 / 100
 7955 ms 8256 KB 
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#include "elephants.h"
/**
 *      Author:  Nicholas Winschel
 *      Created: 06.06.2023 11:07:24
**/

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using db=long double;
template<class T> using V=vector<T>;
using vi = V<int>;
using vl = V<ll>;
using pi = pair<int,int>;
#define f first
#define s second
#define sz(x) (int)((x).size())

int n,l;
const int MAXN=150000;
const int BS=600;
int pos[MAXN],j[MAXN],h[MAXN],ord[MAXN],w[MAXN];
int buck[MAXN/BS + 5][3*BS+1],s[MAXN/BS+5];
int cnt = 0;

int llt(int v, int x) {
  if (!s[v] || pos[buck[v][0]] >= x) return -1;
  int l = 0,r=s[v];
  while (r-l>1) {
    int m = (l+r)>>1;
    if (pos[buck[v][m]] >= x) r=m;
    else l=m;
  }
  return l;
}

void fixbuck(int i) {
  if (s[i]>=2*BS) cnt=2*BS;
  // cerr << "fb: " << i << endl;
  // for (int x =0; x < s[i]; x++) cerr << buck[i][x] << " ";
  // cerr << endl;
  if (!s[i]) return;
  j[buck[i][0]]=pos[buck[i][0]]-l,h[buck[i][0]]=1;
  int lp = 0;
  for (int k = 1; k < s[i]; k++) {
    while (lp < s[i]-1 && pos[buck[i][lp+1]]<pos[buck[i][k]]-l) lp++;
    if (pos[buck[i][lp]] < pos[buck[i][k]]-l) {
      // cerr << "test" << endl;
      j[buck[i][k]]=j[buck[i][lp]];
      h[buck[i][k]]=h[buck[i][lp]]+1;
    } else {
      j[buck[i][k]]=pos[buck[i][k]]-l;
      h[buck[i][k]]=1;
    }
  }
}

void fixall() {
  // cerr << "REALLOC" << endl;
  int cur = 0;
  for (int i = 0; i <= (n-1)/BS; i++) {
    for (int x = 0; x < s[i]; x++) ord[cur++]=buck[i][x];
  }
  int c = 0;
  for (int i = 0; i < n; i++) {
    buck[i/BS][c++]=ord[i];
    w[ord[i]]=i/BS;
    if (i == n-1 || (i+1)/BS != i/BS) s[i/BS]=(c),c=0,fixbuck(i/BS);
  }
}

void init(int N, int L, int X[])
{
  n = N;
  l = L;
  memcpy(pos,X,N*sizeof(int));
  for (int i = 0; i < N; i++) {
    buck[i/BS][s[i/BS]++]=(i);
  }
  fixall();
}

int update(int i, int y)
{
  // cerr << "mov: " << i << " " << y << endl;
  if (cnt > BS) fixall(),cnt=0;
  // buck[w[i]].erase(find(buck[w[i]].begin(),buck[w[i]].end(),i));
  for (int k = 0; k < s[w[i]]-1; k++) {
    if (buck[w[i]][k]==i) {
      for (int kk = k; kk < s[w[i]]-1; kk++) buck[w[i]][kk]=buck[w[i]][kk+1];
      break;
    }
  }
  s[w[i]]--;
  fixbuck(w[i]);
  pos[i]=y;
  w[i]=0;
  for (int k = 0; k <= (n-1)/BS; k++) {
    if (s[k] && pos[buck[k][0]] < pos[i]) w[i]=k;
  }
  int ind = llt(w[i],pos[i])+1;
  // buck[w[i]].insert(buck[w[i]].begin()+ind,i);
  s[w[i]]++;
  // cerr << "dbg2: " << ind << endl;
  for (int k = s[w[i]]-1; k > ind; k--) {
    // cerr << k << " " << buck[w[i]][k] << " " << buck[w[i]][k-1] << endl;
    buck[w[i]][k]=buck[w[i]][k-1];
  }
  buck[w[i]][ind]=i;
  fixbuck(w[i]);
  // for (int i = 0; i < n; i++) {
  //   cerr << "dbg: " << i << " " << pos[i] << " " << j[i] << " " << h[i] << endl; 
  // }
  int cur = 2e9,ret=0;
  for (int i = (n-1)/BS; i >= 0; i--) {
    int ind = llt(i,cur);
    if (ind >= 0) {
      ind=buck[i][ind];
      cur=j[ind],ret += h[ind];
      // cerr << "jmp: " << cur << " " << ret << endl;
    }
  }
  return ret;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Correct 1 ms 340 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 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 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 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 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 565 ms 1884 KB Output is correct
8 Correct 618 ms 2040 KB Output is correct
9 Correct 671 ms 3148 KB Output is correct
10 Correct 606 ms 3168 KB Output is correct
11 Correct 544 ms 3164 KB Output is correct
12 Correct 1039 ms 3148 KB Output is correct
13 Correct 620 ms 3276 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 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 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 565 ms 1884 KB Output is correct
8 Correct 618 ms 2040 KB Output is correct
9 Correct 671 ms 3148 KB Output is correct
10 Correct 606 ms 3168 KB Output is correct
11 Correct 544 ms 3164 KB Output is correct
12 Correct 1039 ms 3148 KB Output is correct
13 Correct 620 ms 3276 KB Output is correct
14 Correct 530 ms 2432 KB Output is correct
15 Correct 984 ms 2508 KB Output is correct
16 Correct 1721 ms 3408 KB Output is correct
17 Correct 1980 ms 4076 KB Output is correct
18 Correct 2000 ms 4228 KB Output is correct
19 Correct 1225 ms 4092 KB Output is correct
20 Correct 1879 ms 4100 KB Output is correct
21 Correct 1848 ms 4120 KB Output is correct
22 Correct 1119 ms 4080 KB Output is correct

Subtask #5
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 316 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 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 565 ms 1884 KB Output is correct
8 Correct 618 ms 2040 KB Output is correct
9 Correct 671 ms 3148 KB Output is correct
10 Correct 606 ms 3168 KB Output is correct
11 Correct 544 ms 3164 KB Output is correct
12 Correct 1039 ms 3148 KB Output is correct
13 Correct 620 ms 3276 KB Output is correct
14 Correct 530 ms 2432 KB Output is correct
15 Correct 984 ms 2508 KB Output is correct
16 Correct 1721 ms 3408 KB Output is correct
17 Correct 1980 ms 4076 KB Output is correct
18 Correct 2000 ms 4228 KB Output is correct
19 Correct 1225 ms 4092 KB Output is correct
20 Correct 1879 ms 4100 KB Output is correct
21 Correct 1848 ms 4120 KB Output is correct
22 Correct 1119 ms 4080 KB Output is correct
23 Correct 5475 ms 7772 KB Output is correct
24 Correct 5656 ms 7796 KB Output is correct
25 Correct 4893 ms 7836 KB Output is correct
26 Correct 6162 ms 7856 KB Output is correct
27 Correct 6022 ms 7884 KB Output is correct
28 Correct 2551 ms 2892 KB Output is correct
29 Correct 2551 ms 3000 KB Output is correct
30 Correct 2546 ms 2956 KB Output is correct
31 Correct 2505 ms 2892 KB Output is correct
32 Correct 3954 ms 7832 KB Output is correct
33 Correct 2819 ms 7832 KB Output is correct
34 Correct 4886 ms 7832 KB Output is correct
35 Correct 2902 ms 8108 KB Output is correct
36 Correct 1309 ms 7836 KB Output is correct
37 Correct 6809 ms 8256 KB Output is correct
38 Correct 4994 ms 7640 KB Output is correct
39 Correct 5349 ms 7656 KB Output is correct
40 Correct 4744 ms 7640 KB Output is correct
41 Correct 7908 ms 7780 KB Output is correct
42 Correct 7955 ms 7228 KB Output is correct