oj.uz

Submission #987174

# Submission time Handle Problem Language Result Execution time Memory
987174 2024-05-22T08:08:39 Z huutuan Dancing Elephants (IOI11_elephants) C++14
97 / 100
 3655 ms 30060 KB 
#include "elephants.h"

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int N=2e5+10, inf=1e9, S=500, S2=499;
int n, m, len, a[N];
pair<int, int> pos[N];
vector<pair<int, int>> vv;
int cnt_query;

struct Block{
   vector<int> v, nxt, jump, cnt;
   int lazy, id;
   Block(){ lazy=-1; id=0; }
   void push(){
      if (lazy!=-1){
         for (int i=0; i<(int)v.size(); ++i){
            nxt[i]=lazy;
            jump[i]=lazy;
            cnt[i]=1;
         }
         lazy=-1;
      }
   }
   void calc(){
      for (int i=0; i<(int)v.size(); ++i) pos[v[i]]={id, i};
      for (int i=(int)v.size()-1; i>=0; --i){
         if (pos[nxt[i]].first!=id){
            jump[i]=nxt[i];
            cnt[i]=1;
         }else{
            jump[i]=jump[pos[nxt[i]].second];
            cnt[i]=cnt[pos[nxt[i]].second]+1;
         }
      }
   }
   int get_nxt(int i){
      if (lazy==-1) return nxt[i];
      return lazy;
   }
} bl[N/S+10];

void build(bool p){
   vector<pair<int, int>> v;
   if (!p){
      v.emplace_back(n, n);
      for (int i=n-1, j=n; i>=0; --i){
         while (vv[j-1].first-vv[i].first>len) --j;
         v.emplace_back(i, j);
      }
      reverse(v.begin(), v.end());
   }else{
      for (int i=0; i<=m; ++i){
         bl[i].push();
         for (int j=0; j<(int)bl[i].v.size(); ++j) v.emplace_back(bl[i].v[j], bl[i].nxt[j]);
         bl[i].v.clear();
         bl[i].nxt.clear();
         bl[i].jump.clear();
         bl[i].cnt.clear();
      }
   }
   m=0;
   for (int i=0; i<=n; ++i){
      if ((int)bl[m].v.size()==S || i==n) ++m;
      bl[m].id=m;
      pos[v[i].first]={m, bl[m].v.size()};
      bl[m].v.push_back(v[i].first);
      bl[m].nxt.push_back(v[i].second);
      bl[m].jump.push_back(0);
      bl[m].cnt.push_back(0);
   }
   bl[m].jump[0]=n;
   for (int i=0; i<m; ++i){
      bl[i].calc();
   }
}

void update(int l, int r, int val){
   if (pos[l].first==pos[r].first){
      int id=pos[l].first;
      bl[id].push();
      for (int i=pos[l].second; i<=pos[r].second; ++i){
         bl[id].nxt[i]=val;
      }
      bl[id].calc();
      return;
   }
   {
      int id=pos[l].first;
      bl[id].push();
      for (int i=pos[l].second; i<(int)bl[id].v.size(); ++i) bl[id].nxt[i]=val;
      bl[id].calc();
   }
   {
      int id=pos[r].first;
      bl[id].push();
      for (int i=0; i<=pos[r].second; ++i) bl[id].nxt[i]=val;
      bl[id].calc();
   }
   for (int i=pos[l].first+1; i<pos[r].first; ++i) bl[i].lazy=val;
}

int get(){
   pair<int, int> p={0, 0};
   int ans=0;
   while (p.first!=m){
      if (bl[p.first].lazy==-1){
         ans+=bl[p.first].cnt[p.second];
         p=pos[bl[p.first].jump[p.second]];
      }else{
         ++ans;
         p=pos[bl[p.first].lazy];
      }
   }
   return ans;
}

void init(int32_t _N, int32_t L, int32_t X[])
{
   n=_N;
   len=L;
   for (int i=0; i<n; ++i) a[i]=X[i];
   a[n]=inf;
   for (int i=0; i<n; ++i){
      vv.emplace_back(a[i], i);
   }
   sort(vv.begin(), vv.end());
   build(0);
}

int32_t update(int32_t _i, int32_t _y)
{
   ++cnt_query;
   // cout << cnt_query << endl;
   if (cnt_query%S2==0){
      build(1);
   }
   int i=_i, y=_y;
   int tl=-1, tr=-1, tt=-1;
   {
      int id=m;
      while (id>=0){
         if (pos[bl[id].get_nxt(0)]>pos[i]) --id;
         else{
            for (int j=(int)bl[id].v.size()-1; j>=0; --j){
               if (pos[bl[id].get_nxt(j)]<=pos[i]){
                  tr=bl[id].v[j];
                  break;
               }
            }
            break;
         }
      }
   }
   {
      int id=0;
      while (1){
         if (pos[bl[id].get_nxt((int)bl[id].v.size()-1)]<pos[i]) ++id;
         else{
            for (int j=0; j<(int)bl[id].v.size(); ++j){
               if (pos[bl[id].get_nxt(j)]>=pos[i]){
                  tl=bl[id].v[j];
                  break;
               }
            }
            break;
         }
      }
   }
   {
      pair<int, int> p=pos[i];
      ++p.second;
      if (p.second>=(int)bl[p.first].v.size()) ++p.first, p.second=0;
      tt=bl[p.first].v[p.second];
   }
   if (tl!=-1 && tr!=-1 && pos[tl]<=pos[tr]){
      update(tl, tr, tt);
   }
   bl[pos[i].first].v.erase(bl[pos[i].first].v.begin()+pos[i].second);
   bl[pos[i].first].nxt.erase(bl[pos[i].first].nxt.begin()+pos[i].second);
   bl[pos[i].first].jump.erase(bl[pos[i].first].jump.begin()+pos[i].second);
   bl[pos[i].first].cnt.erase(bl[pos[i].first].cnt.begin()+pos[i].second);
   bl[pos[i].first].calc();
   if (bl[m-1].v.empty()){
      bl[m-1]=bl[m];
      --bl[m-1].id;
      pos[n]={m-1, 0};
      --m;
   }
   pair<int, int> p={-1, -1}, p2={-1, -1};
   {
      a[i]=y;
      int id=m-1;
      while (1){
         if (id && make_pair(a[bl[id].v[0]], bl[id].v[0])>make_pair(a[i], i)) --id;
         else{
            p={id, 0};
            for (int j=0; j<(int)bl[id].v.size(); ++j){
               if (make_pair(a[bl[id].v[j]], bl[id].v[j])<=make_pair(a[i], i)){
                  p={id, j+1};
               }
            }
            break;
         }
      }
   }
   bl[p.first].push();
   bl[p.first].v.insert(bl[p.first].v.begin()+p.second, i);
   {
      int id=0;
      while (1){
         if (make_pair(a[bl[id].v.back()], bl[id].v.back())<make_pair(a[i]+len, inf)) ++id;
         else{
            for (int j=0; j<(int)bl[id].v.size(); ++j){
               if (make_pair(a[bl[id].v[j]], bl[id].v[j])>=make_pair(a[i]+len, inf)){
                  p2={id, j};
                  break;
               }
            }
            break;
         }
      }
   }
   bl[p.first].nxt.insert(bl[p.first].nxt.begin()+p.second, bl[p2.first].v[p2.second]);
   bl[p.first].jump.insert(bl[p.first].jump.begin()+p.second, 0);
   bl[p.first].cnt.insert(bl[p.first].cnt.begin()+p.second, 0);
   bl[p.first].calc();
   p2=p;
   ++p2.second;
   if (p2.second==(int)bl[p2.first].v.size()) ++p2.first, p2.second=0;
   {
      tl=-1, tr=-1, tt=-1;
      {
         int id=m;
         while (id>=0){
            if (id && (pos[bl[id].get_nxt(0)]>p2 || a[bl[id].v[0]]+len>=y)) --id;
            else{
               for (int j=(int)bl[id].v.size()-1; j>=0; --j){
                  if (pos[bl[id].get_nxt(j)]<=p2 && a[bl[id].v[j]]+len<y){
                     tr=bl[id].v[j];
                     break;
                  }
               }
               break;
            }
         }
      }
      {
         int id=0;
         while (1){
            if (pos[bl[id].get_nxt((int)bl[id].v.size()-1)]<p2) ++id;
            else{
               for (int j=0; j<(int)bl[id].v.size(); ++j){
                  if (pos[bl[id].get_nxt(j)]>=p2){
                     tl=bl[id].v[j];
                     break;
                  }
               }
               break;
            }
         }
      }
      if (tl!=-1 && tr!=-1 && pos[tl]<=pos[tr]){
         update(tl, tr, i);
      }
   }
   return get();
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 395 ms 3416 KB Output is correct
8 Correct 459 ms 4256 KB Output is correct
9 Correct 570 ms 8252 KB Output is correct
10 Correct 495 ms 8064 KB Output is correct
11 Correct 469 ms 8024 KB Output is correct
12 Correct 729 ms 8800 KB Output is correct
13 Correct 488 ms 7832 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 395 ms 3416 KB Output is correct
8 Correct 459 ms 4256 KB Output is correct
9 Correct 570 ms 8252 KB Output is correct
10 Correct 495 ms 8064 KB Output is correct
11 Correct 469 ms 8024 KB Output is correct
12 Correct 729 ms 8800 KB Output is correct
13 Correct 488 ms 7832 KB Output is correct
14 Correct 565 ms 5532 KB Output is correct
15 Correct 575 ms 6008 KB Output is correct
16 Correct 852 ms 8860 KB Output is correct
17 Correct 1074 ms 12300 KB Output is correct
18 Correct 1122 ms 12332 KB Output is correct
19 Correct 835 ms 12100 KB Output is correct
20 Correct 1066 ms 12404 KB Output is correct
21 Correct 1154 ms 12560 KB Output is correct
22 Correct 834 ms 11536 KB Output is correct

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 395 ms 3416 KB Output is correct
8 Correct 459 ms 4256 KB Output is correct
9 Correct 570 ms 8252 KB Output is correct
10 Correct 495 ms 8064 KB Output is correct
11 Correct 469 ms 8024 KB Output is correct
12 Correct 729 ms 8800 KB Output is correct
13 Correct 488 ms 7832 KB Output is correct
14 Correct 565 ms 5532 KB Output is correct
15 Correct 575 ms 6008 KB Output is correct
16 Correct 852 ms 8860 KB Output is correct
17 Correct 1074 ms 12300 KB Output is correct
18 Correct 1122 ms 12332 KB Output is correct
19 Correct 835 ms 12100 KB Output is correct
20 Correct 1066 ms 12404 KB Output is correct
21 Correct 1154 ms 12560 KB Output is correct
22 Correct 834 ms 11536 KB Output is correct
23 Correct 3655 ms 25172 KB Output is correct
24 Correct 3619 ms 25180 KB Output is correct
25 Correct 3600 ms 25036 KB Output is correct
26 Correct 3214 ms 25124 KB Output is correct
27 Correct 3378 ms 24564 KB Output is correct
28 Correct 1114 ms 5624 KB Output is correct
29 Correct 1125 ms 5572 KB Output is correct
30 Correct 1065 ms 5692 KB Output is correct
31 Correct 1075 ms 5656 KB Output is correct
32 Correct 3132 ms 24392 KB Output is correct
33 Correct 2965 ms 22408 KB Output is correct
34 Correct 3200 ms 22660 KB Output is correct
35 Runtime error 83 ms 30060 KB Execution killed with signal 11
36 Halted 0 ms 0 KB -