oj.uz

Submission #122718

# Submission time Handle Problem Language Result Execution time Memory
122718 2019-06-29T07:34:17 Z nvmdava Dancing Elephants (IOI11_elephants) C++17
97 / 100
 9000 ms 7812 KB 
#include "elephants.h"
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pii pair<int, int>
using namespace std;
#define SQ 400
int n, l;
int loc[150005];
int bid[150005];

vector<vector<pair<int , pii> > > buck;
vector<pair<int, pii> > emp;
//{LOC {count, last} }


int find(){
   int res = 0;
   int lst = -1;
   for(auto& v : buck){
      if(v.empty() || v.back().ff <= lst) continue;
      int id = upper_bound(v.begin(), v.end(), lst, [](const int& lhs, const pair<int, pii>& rhs){
         return lhs < rhs.ff;
      }) - v.begin();
      res += v[id].ss.ff;
      lst = v[id].ss.ss;
   }
   return res;
}

void recalc(vector<pair<int, pii> >& vec){
   int sz = vec.size();
   int r = sz;
   for(int l = sz - 1; l >= 0; l--){
      while(vec[r - 1].ff > vec[l].ff + ::l) r--;
      vec[l].ss.ff = (r == sz ? 0 : vec[r].ss.ff) + 1;
      vec[l].ss.ss = (r == sz ? vec[l].ff + ::l : vec[r].ss.ss);
   }
}
vector<pii> sorted;
void renew(){
   for(int i = 0; i < n; i++){
      sorted[i].ff = loc[i];
      sorted[i].ss = i;
   }
   sort(sorted.begin(), sorted.end());
   buck.clear();
   for(int i = 0; i < n; i++){
      if(i % SQ == 0){
         buck.push_back(emp);
      }
      buck.back().push_back({sorted[i].ff, {0, 0}});
      bid[sorted[i].ss] = i / SQ;
   }
   for(auto& x : buck){
      recalc(x);
   }
}
void init(int N, int L, int X[]){
   n = N; l = L;
   for(int i = 0; i < n; i++){
      loc[i] = X[i];
   }
   sorted.resize(n);
   renew();
}
int cnt = 0;
void erase(vector<pair<int, pii> >& buck, int x){
   for(int i = 1; i < buck.size(); i++){
      if(buck[i - 1].ff == x) swap(buck[i - 1], buck[i]);
   }
   buck.pop_back();
   recalc(buck);
}
void insert(vector<pair<int, pii> >& buck, int x){
   buck.push_back({x, {0, 0}});
   int i = buck.size() - 1;
   while(i != 0 && buck[i - 1].ff > buck[i].ff){
      swap(buck[i - 1], buck[i]);
      i--;
   }
   recalc(buck);
}
int update(int j, int y){
   if(loc[j] == y) return find();
   if(++cnt % SQ == 0){
      loc[j] = y;
      renew();
   } else {
      erase(buck[bid[j]], loc[j]);
      int t = upper_bound(buck.begin(), buck.end(), y, [](const int& lhs, const vector<pair<int, pii> >& rhs){
         return rhs.back().ff >= lhs;
      }) - buck.begin();
      if(t == buck.size()) t--;
      insert(buck[t], y);
      loc[j] = y;
      bid[j] = t;
   }
   return find();
}

Compilation message

elephants.cpp: In function 'void erase(std::vector<std::pair<int, std::pair<int, int> > >&, int)':
elephants.cpp:69:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 1; i < buck.size(); i++){
                   ~~^~~~~~~~~~~~~
elephants.cpp: In function 'int update(int, int)':
elephants.cpp:94:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       if(t == buck.size()) t--;
          ~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 336 ms 1596 KB Output is correct
8 Correct 374 ms 1760 KB Output is correct
9 Correct 580 ms 2824 KB Output is correct
10 Correct 727 ms 2924 KB Output is correct
11 Correct 738 ms 2984 KB Output is correct
12 Correct 1164 ms 2944 KB Output is correct
13 Correct 825 ms 2860 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 336 ms 1596 KB Output is correct
8 Correct 374 ms 1760 KB Output is correct
9 Correct 580 ms 2824 KB Output is correct
10 Correct 727 ms 2924 KB Output is correct
11 Correct 738 ms 2984 KB Output is correct
12 Correct 1164 ms 2944 KB Output is correct
13 Correct 825 ms 2860 KB Output is correct
14 Correct 522 ms 1988 KB Output is correct
15 Correct 577 ms 2188 KB Output is correct
16 Correct 1795 ms 3184 KB Output is correct
17 Correct 2093 ms 4052 KB Output is correct
18 Correct 2209 ms 3864 KB Output is correct
19 Correct 1370 ms 4056 KB Output is correct
20 Correct 2098 ms 4096 KB Output is correct
21 Correct 2037 ms 4004 KB Output is correct
22 Correct 1504 ms 4148 KB Output is correct

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 336 ms 1596 KB Output is correct
8 Correct 374 ms 1760 KB Output is correct
9 Correct 580 ms 2824 KB Output is correct
10 Correct 727 ms 2924 KB Output is correct
11 Correct 738 ms 2984 KB Output is correct
12 Correct 1164 ms 2944 KB Output is correct
13 Correct 825 ms 2860 KB Output is correct
14 Correct 522 ms 1988 KB Output is correct
15 Correct 577 ms 2188 KB Output is correct
16 Correct 1795 ms 3184 KB Output is correct
17 Correct 2093 ms 4052 KB Output is correct
18 Correct 2209 ms 3864 KB Output is correct
19 Correct 1370 ms 4056 KB Output is correct
20 Correct 2098 ms 4096 KB Output is correct
21 Correct 2037 ms 4004 KB Output is correct
22 Correct 1504 ms 4148 KB Output is correct
23 Correct 4741 ms 7776 KB Output is correct
24 Correct 5098 ms 7688 KB Output is correct
25 Correct 4041 ms 7780 KB Output is correct
26 Correct 5964 ms 7812 KB Output is correct
27 Correct 6612 ms 7772 KB Output is correct
28 Correct 1599 ms 2296 KB Output is correct
29 Correct 1553 ms 2324 KB Output is correct
30 Correct 1597 ms 2428 KB Output is correct
31 Correct 1565 ms 2324 KB Output is correct
32 Correct 5581 ms 7744 KB Output is correct
33 Correct 5307 ms 7756 KB Output is correct
34 Correct 5890 ms 7808 KB Output is correct
35 Correct 5332 ms 7780 KB Output is correct
36 Correct 168 ms 7288 KB Output is correct
37 Execution timed out 9023 ms 7780 KB Time limit exceeded
38 Halted 0 ms 0 KB -