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Submission #754126

# Submission time Handle Problem Language Result Execution time Memory
754126 2023-06-06T18:14:51 Z nicksms Dancing Elephants (IOI11_elephants) C++17
97 / 100
 9000 ms 8276 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=400,OBS=950;
int pos[MAXN],j[MAXN],h[MAXN],ord[MAXN],w[MAXN];
int buck[MAXN/BS + 5][3*OBS+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, int hint=0) {
  if (s[i]>=2*OBS) cnt=2*BS;
  // cerr << "fb: " << i << endl;
  // for (int x =0; x < s[i]; x++) cerr << buck[i][x] << " ";
  // cerr << endl;
  if (!s[i] || hint >= s[i]) return;
  j[buck[i][0]]=pos[buck[i][0]]-l,h[buck[i][0]]=1;
  int lp = 0;
  if (hint > 10) lp = max(lp, llt(i,pos[buck[i][hint]]-l));
  for (int k = max(1,hint); 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));
  int ind = s[w[i]]-1;
  for (int k = llt(w[i],pos[i])+1; k < s[w[i]]-1; k++) {
    if (buck[w[i]][k]==i) {
      ind=k;
      break;
    }
  }
  memmove(buck[w[i]] + ind, buck[w[i]] + ind + 1, (s[w[i]]-ind)*sizeof(int));
  s[w[i]]--;
  fixbuck(w[i],ind);
  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;
  }
  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];
  // }
  memmove(buck[w[i]]+ind+1,buck[w[i]]+ind,(s[w[i]]-ind)*sizeof(int));
  buck[w[i]][ind]=i;
  fixbuck(w[i],ind);
  // 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 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 340 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 340 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 276 ms 1392 KB Output is correct
8 Correct 354 ms 1592 KB Output is correct
9 Correct 587 ms 2800 KB Output is correct
10 Correct 563 ms 2892 KB Output is correct
11 Correct 414 ms 2800 KB Output is correct
12 Correct 893 ms 3020 KB Output is correct
13 Correct 581 ms 2892 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 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 276 ms 1392 KB Output is correct
8 Correct 354 ms 1592 KB Output is correct
9 Correct 587 ms 2800 KB Output is correct
10 Correct 563 ms 2892 KB Output is correct
11 Correct 414 ms 2800 KB Output is correct
12 Correct 893 ms 3020 KB Output is correct
13 Correct 581 ms 2892 KB Output is correct
14 Correct 406 ms 2120 KB Output is correct
15 Correct 572 ms 2044 KB Output is correct
16 Correct 1259 ms 3168 KB Output is correct
17 Correct 1616 ms 3976 KB Output is correct
18 Correct 1699 ms 4176 KB Output is correct
19 Correct 1282 ms 3788 KB Output is correct
20 Correct 1692 ms 3960 KB Output is correct
21 Correct 1721 ms 3940 KB Output is correct
22 Correct 1110 ms 3792 KB Output is correct

Subtask #5
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 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 276 ms 1392 KB Output is correct
8 Correct 354 ms 1592 KB Output is correct
9 Correct 587 ms 2800 KB Output is correct
10 Correct 563 ms 2892 KB Output is correct
11 Correct 414 ms 2800 KB Output is correct
12 Correct 893 ms 3020 KB Output is correct
13 Correct 581 ms 2892 KB Output is correct
14 Correct 406 ms 2120 KB Output is correct
15 Correct 572 ms 2044 KB Output is correct
16 Correct 1259 ms 3168 KB Output is correct
17 Correct 1616 ms 3976 KB Output is correct
18 Correct 1699 ms 4176 KB Output is correct
19 Correct 1282 ms 3788 KB Output is correct
20 Correct 1692 ms 3960 KB Output is correct
21 Correct 1721 ms 3940 KB Output is correct
22 Correct 1110 ms 3792 KB Output is correct
23 Correct 6016 ms 7680 KB Output is correct
24 Correct 6155 ms 7684 KB Output is correct
25 Correct 5663 ms 7684 KB Output is correct
26 Correct 5700 ms 7688 KB Output is correct
27 Correct 6996 ms 7688 KB Output is correct
28 Correct 1158 ms 2280 KB Output is correct
29 Correct 1237 ms 2276 KB Output is correct
30 Correct 1171 ms 2392 KB Output is correct
31 Correct 1245 ms 2388 KB Output is correct
32 Correct 3786 ms 7688 KB Output is correct
33 Correct 2677 ms 7688 KB Output is correct
34 Correct 5880 ms 7688 KB Output is correct
35 Correct 3216 ms 8276 KB Output is correct
36 Correct 1270 ms 7688 KB Output is correct
37 Correct 8447 ms 7964 KB Output is correct
38 Correct 6323 ms 7624 KB Output is correct
39 Correct 6253 ms 7684 KB Output is correct
40 Correct 6166 ms 7684 KB Output is correct
41 Execution timed out 9066 ms 8000 KB Time limit exceeded
42 Halted 0 ms 0 KB -