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Submission #1081050

# Submission time Handle Problem Language Result Execution time Memory
1081050 2024-08-29T17:34:24 Z juicy The Big Prize (IOI17_prize) C++17
100 / 100
 36 ms 15532 KB 
// http://ioi2017.org/tasks/editorial/prize.pdf

#include "prize.h"

#include <bits/stdc++.h>

using namespace std;

int find_best(int n) {
  vector<vector<int>> memo(n);
  auto Ask = [&](int i) {
    if (!memo[i].size()) {
      memo[i] = ask(i);
    }
  }; 
  vector<set<int>> st(n + 1);
  int res = -1;
  function<void(int, int)> dc = [&](int l, int r) {
    if (l > r || ~res) {
      return;
    }
    int md = (l + r) / 2;
    Ask(md);
    int key = memo[md][0] + memo[md][1];
    if (!key) {
      res = md;
      return;
    }
    auto it = st[key].insert(md).first;
    if (it == st[key].begin() ? memo[md][0] : memo[md][0] - memo[*prev(it)][0] > 0) {
      dc(l, md - 1);
    }
    if (~res) {
      return;
    }
    if (next(it) == st[key].end() ? memo[md][1] : memo[*next(it)][0] - memo[md][0] > 0) {
      dc(md + 1, r);
    }
  };
  dc(0, n - 1);
  return res;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 14424 KB Output is correct
2 Correct 4 ms 14424 KB Output is correct
3 Correct 3 ms 14424 KB Output is correct
4 Correct 4 ms 14424 KB Output is correct
5 Correct 4 ms 14424 KB Output is correct
6 Correct 3 ms 14424 KB Output is correct
7 Correct 4 ms 14424 KB Output is correct
8 Correct 3 ms 14424 KB Output is correct
9 Correct 3 ms 14424 KB Output is correct
10 Correct 4 ms 14424 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 14424 KB Output is correct
2 Correct 4 ms 14424 KB Output is correct
3 Correct 4 ms 14424 KB Output is correct
4 Correct 4 ms 14424 KB Output is correct
5 Correct 4 ms 14420 KB Output is correct
6 Correct 4 ms 14680 KB Output is correct
7 Correct 4 ms 14424 KB Output is correct
8 Correct 4 ms 14452 KB Output is correct
9 Correct 4 ms 14424 KB Output is correct
10 Correct 4 ms 14424 KB Output is correct
11 Correct 5 ms 14680 KB Output is correct
12 Correct 4 ms 14424 KB Output is correct
13 Correct 7 ms 14424 KB Output is correct
14 Correct 2 ms 1880 KB Output is correct
15 Correct 8 ms 14564 KB Output is correct
16 Correct 32 ms 15532 KB Output is correct
17 Correct 4 ms 14424 KB Output is correct
18 Correct 28 ms 15000 KB Output is correct
19 Correct 4 ms 14424 KB Output is correct
20 Correct 8 ms 7572 KB Output is correct
21 Correct 13 ms 14700 KB Output is correct
22 Correct 5 ms 14424 KB Output is correct
23 Correct 4 ms 14424 KB Output is correct
24 Correct 5 ms 14424 KB Output is correct
25 Correct 15 ms 14680 KB Output is correct
26 Correct 13 ms 14672 KB Output is correct
27 Correct 4 ms 14424 KB Output is correct
28 Correct 31 ms 15244 KB Output is correct
29 Correct 13 ms 14672 KB Output is correct
30 Correct 22 ms 14928 KB Output is correct
31 Correct 4 ms 14424 KB Output is correct
32 Correct 5 ms 14796 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 14 ms 14760 KB Output is correct
35 Correct 4 ms 14424 KB Output is correct
36 Correct 7 ms 14424 KB Output is correct
37 Correct 4 ms 14424 KB Output is correct
38 Correct 4 ms 14424 KB Output is correct
39 Correct 13 ms 14540 KB Output is correct
40 Correct 22 ms 14764 KB Output is correct
41 Correct 12 ms 14672 KB Output is correct
42 Correct 13 ms 14928 KB Output is correct
43 Correct 21 ms 14608 KB Output is correct
44 Correct 11 ms 14424 KB Output is correct
45 Correct 13 ms 14424 KB Output is correct
46 Correct 4 ms 14424 KB Output is correct
47 Correct 15 ms 14648 KB Output is correct
48 Correct 19 ms 14680 KB Output is correct
49 Correct 5 ms 14424 KB Output is correct
50 Correct 32 ms 14816 KB Output is correct
51 Correct 13 ms 14680 KB Output is correct
52 Correct 5 ms 14424 KB Output is correct
53 Correct 4 ms 14424 KB Output is correct
54 Correct 13 ms 14804 KB Output is correct
55 Correct 3 ms 14424 KB Output is correct
56 Correct 21 ms 14704 KB Output is correct
57 Correct 24 ms 14680 KB Output is correct
58 Correct 20 ms 14936 KB Output is correct
59 Correct 18 ms 14968 KB Output is correct
60 Correct 16 ms 14680 KB Output is correct
61 Correct 4 ms 14424 KB Output is correct
62 Correct 4 ms 14424 KB Output is correct
63 Correct 4 ms 14424 KB Output is correct
64 Correct 4 ms 14424 KB Output is correct
65 Correct 5 ms 14424 KB Output is correct
66 Correct 3 ms 14508 KB Output is correct
67 Correct 4 ms 14424 KB Output is correct
68 Correct 4 ms 14424 KB Output is correct
69 Correct 4 ms 14424 KB Output is correct
70 Correct 3 ms 14424 KB Output is correct
71 Correct 30 ms 14672 KB Output is correct
72 Correct 6 ms 14680 KB Output is correct
73 Correct 36 ms 15128 KB Output is correct
74 Correct 30 ms 14844 KB Output is correct
75 Correct 4 ms 14424 KB Output is correct
76 Correct 17 ms 14984 KB Output is correct
77 Correct 20 ms 14716 KB Output is correct
78 Correct 7 ms 14568 KB Output is correct
79 Correct 13 ms 14764 KB Output is correct
80 Correct 25 ms 14928 KB Output is correct
81 Correct 26 ms 15008 KB Output is correct
82 Correct 29 ms 15004 KB Output is correct
83 Correct 4 ms 14424 KB Output is correct
84 Correct 30 ms 14680 KB Output is correct
85 Correct 22 ms 14680 KB Output is correct
86 Correct 7 ms 14424 KB Output is correct
87 Correct 4 ms 14424 KB Output is correct
88 Correct 6 ms 14420 KB Output is correct
89 Correct 6 ms 14424 KB Output is correct
90 Correct 4 ms 14424 KB Output is correct
91 Correct 5 ms 14424 KB Output is correct
92 Correct 4 ms 14424 KB Output is correct
93 Correct 6 ms 14424 KB Output is correct
94 Correct 6 ms 14544 KB Output is correct
95 Correct 5 ms 14424 KB Output is correct
96 Correct 5 ms 14424 KB Output is correct
97 Correct 3 ms 14424 KB Output is correct