oj.uz

Submission #754096

# Submission time Handle Problem Language Result Execution time Memory
754096 2023-06-06T17:01:36 Z nicksms Dancing Elephants (IOI11_elephants) C++17
100 / 100
 8908 ms 7564 KB 
#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=540;
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 340 KB Output is correct
3 Correct 0 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 340 KB Output is correct
3 Correct 0 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 340 KB Output is correct
3 Correct 0 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 578 ms 1364 KB Output is correct
8 Correct 595 ms 1540 KB Output is correct
9 Correct 651 ms 2664 KB Output is correct
10 Correct 663 ms 2668 KB Output is correct
11 Correct 579 ms 2664 KB Output is correct
12 Correct 1006 ms 2680 KB Output is correct
13 Correct 691 ms 2668 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 340 KB Output is correct
3 Correct 0 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 578 ms 1364 KB Output is correct
8 Correct 595 ms 1540 KB Output is correct
9 Correct 651 ms 2664 KB Output is correct
10 Correct 663 ms 2668 KB Output is correct
11 Correct 579 ms 2664 KB Output is correct
12 Correct 1006 ms 2680 KB Output is correct
13 Correct 691 ms 2668 KB Output is correct
14 Correct 501 ms 1776 KB Output is correct
15 Correct 956 ms 1988 KB Output is correct
16 Correct 1708 ms 2912 KB Output is correct
17 Correct 1823 ms 3600 KB Output is correct
18 Correct 1967 ms 3592 KB Output is correct
19 Correct 1284 ms 3592 KB Output is correct
20 Correct 1969 ms 3732 KB Output is correct
21 Correct 1855 ms 3700 KB Output is correct
22 Correct 1200 ms 3588 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 340 KB Output is correct
3 Correct 0 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 578 ms 1364 KB Output is correct
8 Correct 595 ms 1540 KB Output is correct
9 Correct 651 ms 2664 KB Output is correct
10 Correct 663 ms 2668 KB Output is correct
11 Correct 579 ms 2664 KB Output is correct
12 Correct 1006 ms 2680 KB Output is correct
13 Correct 691 ms 2668 KB Output is correct
14 Correct 501 ms 1776 KB Output is correct
15 Correct 956 ms 1988 KB Output is correct
16 Correct 1708 ms 2912 KB Output is correct
17 Correct 1823 ms 3600 KB Output is correct
18 Correct 1967 ms 3592 KB Output is correct
19 Correct 1284 ms 3592 KB Output is correct
20 Correct 1969 ms 3732 KB Output is correct
21 Correct 1855 ms 3700 KB Output is correct
22 Correct 1200 ms 3588 KB Output is correct
23 Correct 5886 ms 7300 KB Output is correct
24 Correct 6134 ms 7304 KB Output is correct
25 Correct 5488 ms 7300 KB Output is correct
26 Correct 6544 ms 7304 KB Output is correct
27 Correct 6379 ms 7300 KB Output is correct
28 Correct 2266 ms 2252 KB Output is correct
29 Correct 2152 ms 2252 KB Output is correct
30 Correct 2272 ms 2276 KB Output is correct
31 Correct 2154 ms 2308 KB Output is correct
32 Correct 4230 ms 7300 KB Output is correct
33 Correct 3159 ms 7300 KB Output is correct
34 Correct 5583 ms 7300 KB Output is correct
35 Correct 3139 ms 7564 KB Output is correct
36 Correct 1364 ms 7296 KB Output is correct
37 Correct 7348 ms 7348 KB Output is correct
38 Correct 5657 ms 7300 KB Output is correct
39 Correct 5964 ms 7300 KB Output is correct
40 Correct 6175 ms 7372 KB Output is correct
41 Correct 8908 ms 7444 KB Output is correct
42 Correct 8630 ms 7320 KB Output is correct