oj.uz

Submission #1030914

# Submission time Handle Problem Language Result Execution time Memory
1030914 2024-07-22T12:00:34 Z huutuan The Big Prize (IOI17_prize) C++14
100 / 100
 178 ms 187588 KB 
#include "prize.h"

#include <bits/stdc++.h>

using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace __gnu_pbds;

template<class T>
using ordered_set=tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

vector<int> mem[200000];

vector<int> Ask(int i){
   if (mem[i].size()) return mem[i];
   return mem[i]=ask(i);
}

int find_best(int n) {
   for (int i=0; i<n; ++i) mem[i].clear();
   // if (n<=5000){
   //    for (int i=0; i<n; ++i){
   //       auto tmp=Ask(i);
   //       if (tmp[0]+tmp[1]==0) return i;
   //    }
   //    return -1;
   // }
   int cnt=0;
   {
      auto tmp=Ask(0);
      cnt=tmp[0]+tmp[1];
   }
   if (!cnt) return 0;
   ordered_set<int> id;
   vector<int> st;
   for (int i=1; i<n; ++i) st.push_back(i);
   auto solve=[&](auto &&self, vector<int> pos, int cc){
      if (!cc || pos.empty()) return;
      int mid=((int)pos.size()-1)/2;
      vector<int> posl, posr;
      for (int j:pos){
         if (j<pos[mid]) posl.push_back(j);
         if (j>pos[mid]) posr.push_back(j);
      }
      auto tmp=Ask(pos[mid]);
      if (tmp[0]+tmp[1]>cnt){
         cnt=tmp[0]+tmp[1];
         st.clear();
         for (int i=0; i<n; ++i) if (mem[i].size()){
            if (mem[i][0]+mem[i][1]<cnt) id.insert(i);
         }else st.push_back(i);
         self(self, st, cnt-(int)id.size());
      }if (tmp[0]+tmp[1]!=cnt){
         id.insert(pos[mid]);
         pos.erase(pos.begin()+mid);
         self(self, pos, cc-1);
      }else{
         int cl=tmp[0]-id.order_of_key(pos[mid]);
         int cr=cc-cl;
         self(self, posl, cl);
         self(self, posr, cr);
      }
   };
   solve(solve, st, cnt-(int)id.size());
   for (int i:id){
      auto tmp=Ask(i);
      if (tmp[0]+tmp[1]==0) return i;
   }
   return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 5 ms 8908 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 5 ms 8652 KB Output is correct
6 Correct 3 ms 4952 KB Output is correct
7 Correct 5 ms 8652 KB Output is correct
8 Correct 5 ms 8652 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8904 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 6 ms 8908 KB Output is correct
3 Correct 7 ms 8908 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 5 ms 8652 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 5 ms 8652 KB Output is correct
8 Correct 6 ms 8652 KB Output is correct
9 Correct 6 ms 8908 KB Output is correct
10 Correct 6 ms 8908 KB Output is correct
11 Correct 9 ms 9164 KB Output is correct
12 Correct 9 ms 9164 KB Output is correct
13 Correct 11 ms 9164 KB Output is correct
14 Correct 9 ms 5720 KB Output is correct
15 Correct 28 ms 9252 KB Output is correct
16 Correct 28 ms 9164 KB Output is correct
17 Correct 34 ms 9464 KB Output is correct
18 Correct 26 ms 9164 KB Output is correct
19 Correct 29 ms 9236 KB Output is correct
20 Correct 22 ms 7368 KB Output is correct
21 Correct 27 ms 9420 KB Output is correct
22 Correct 25 ms 9188 KB Output is correct
23 Correct 7 ms 9164 KB Output is correct
24 Correct 9 ms 8908 KB Output is correct
25 Correct 30 ms 9464 KB Output is correct
26 Correct 38 ms 9708 KB Output is correct
27 Correct 11 ms 8908 KB Output is correct
28 Correct 26 ms 9420 KB Output is correct
29 Correct 29 ms 9236 KB Output is correct
30 Correct 35 ms 9756 KB Output is correct
31 Correct 32 ms 9412 KB Output is correct
32 Correct 10 ms 9160 KB Output is correct
33 Correct 2 ms 4952 KB Output is correct
34 Correct 27 ms 9200 KB Output is correct
35 Correct 7 ms 9164 KB Output is correct
36 Correct 28 ms 9224 KB Output is correct
37 Correct 8 ms 8908 KB Output is correct
38 Correct 10 ms 9156 KB Output is correct
39 Correct 33 ms 9420 KB Output is correct
40 Correct 21 ms 9244 KB Output is correct
41 Correct 34 ms 9164 KB Output is correct
42 Correct 36 ms 9412 KB Output is correct
43 Correct 30 ms 9736 KB Output is correct
44 Correct 29 ms 9212 KB Output is correct
45 Correct 23 ms 9268 KB Output is correct
46 Correct 31 ms 9412 KB Output is correct
47 Correct 26 ms 9420 KB Output is correct
48 Correct 29 ms 9420 KB Output is correct
49 Correct 28 ms 9412 KB Output is correct
50 Correct 38 ms 9164 KB Output is correct
51 Correct 28 ms 9164 KB Output is correct
52 Correct 39 ms 9396 KB Output is correct
53 Correct 7 ms 8908 KB Output is correct
54 Correct 30 ms 9452 KB Output is correct
55 Correct 31 ms 9508 KB Output is correct
56 Correct 31 ms 9548 KB Output is correct
57 Correct 28 ms 9408 KB Output is correct
58 Correct 39 ms 9708 KB Output is correct
59 Correct 26 ms 9356 KB Output is correct
60 Correct 29 ms 9164 KB Output is correct
61 Correct 7 ms 9164 KB Output is correct
62 Correct 8 ms 9164 KB Output is correct
63 Correct 7 ms 9164 KB Output is correct
64 Correct 7 ms 9164 KB Output is correct
65 Correct 8 ms 10700 KB Output is correct
66 Correct 9 ms 10952 KB Output is correct
67 Correct 10 ms 10956 KB Output is correct
68 Correct 11 ms 12236 KB Output is correct
69 Correct 11 ms 10700 KB Output is correct
70 Correct 7 ms 9676 KB Output is correct
71 Correct 34 ms 9232 KB Output is correct
72 Correct 10 ms 9168 KB Output is correct
73 Correct 34 ms 9660 KB Output is correct
74 Correct 43 ms 9672 KB Output is correct
75 Correct 8 ms 8908 KB Output is correct
76 Correct 37 ms 9444 KB Output is correct
77 Correct 30 ms 9412 KB Output is correct
78 Correct 9 ms 9164 KB Output is correct
79 Correct 17 ms 9164 KB Output is correct
80 Correct 40 ms 9420 KB Output is correct
81 Correct 26 ms 9188 KB Output is correct
82 Correct 40 ms 9168 KB Output is correct
83 Correct 7 ms 8908 KB Output is correct
84 Correct 32 ms 9484 KB Output is correct
85 Correct 30 ms 9420 KB Output is correct
86 Correct 18 ms 13124 KB Output is correct
87 Correct 11 ms 12508 KB Output is correct
88 Correct 19 ms 13140 KB Output is correct
89 Correct 18 ms 13244 KB Output is correct
90 Correct 12 ms 11968 KB Output is correct
91 Correct 17 ms 14176 KB Output is correct
92 Correct 178 ms 187588 KB Output is correct
93 Correct 10 ms 9164 KB Output is correct
94 Correct 8 ms 9164 KB Output is correct
95 Correct 9 ms 9164 KB Output is correct
96 Correct 8 ms 8908 KB Output is correct
97 Correct 6 ms 8908 KB Output is correct