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Submission #646195

# Submission time Handle Problem Language Result Execution time Memory
646195 2022-09-29T06:36:11 Z piOOE The Big Prize (IOI17_prize) C++17
100 / 100
 43 ms 396 KB 
#include <bits/stdc++.h>
#include "prize.h"

using namespace std;
using Query = vector<int>;

int find_best(int n) {
    auto valid = [&](Query x) {
        return x[0] + x[1] == 0;
    };

    int ans = -1;

    function<void(int, int, Query, Query)> dfs = [&](int l, int r, Query L, Query R) {
        if (l + 1 >= r || ans != -1 || L == R) {
            return;
        }

        int mid = (l + r) >> 1;
        Query M = ask(mid);

        if (valid(M)) {
            ans = mid;
            return;
        }

        if (L[0] + L[1] == R[0] + R[1] && L[0] + L[1] > M[0] + M[1] && L[1] - R[1] == 1) {
            return;
        }

        dfs(l, mid, L, M), dfs(mid, r, M, R);
    };

    Query L = ask(0);
    if (valid(L)) {
        return 0;
    }

    Query R = ask(n - 1);
    if (valid(R)) {
        return n - 1;
    }

    dfs(0, n - 1, L, R);

    return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 300 KB Output is correct
3 Correct 1 ms 288 KB Output is correct
4 Correct 0 ms 292 KB Output is correct
5 Correct 1 ms 296 KB Output is correct
6 Correct 1 ms 208 KB Output is correct
7 Correct 0 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 288 KB Output is correct
10 Correct 1 ms 208 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 292 KB Output is correct
3 Correct 0 ms 288 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 288 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 292 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 3 ms 288 KB Output is correct
12 Correct 0 ms 296 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 1 ms 396 KB Output is correct
15 Correct 6 ms 292 KB Output is correct
16 Correct 35 ms 296 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 33 ms 292 KB Output is correct
19 Correct 1 ms 208 KB Output is correct
20 Correct 9 ms 292 KB Output is correct
21 Correct 12 ms 208 KB Output is correct
22 Correct 3 ms 296 KB Output is correct
23 Correct 1 ms 296 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 17 ms 296 KB Output is correct
26 Correct 10 ms 296 KB Output is correct
27 Correct 1 ms 208 KB Output is correct
28 Correct 28 ms 208 KB Output is correct
29 Correct 13 ms 288 KB Output is correct
30 Correct 33 ms 208 KB Output is correct
31 Correct 1 ms 208 KB Output is correct
32 Correct 4 ms 208 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 9 ms 292 KB Output is correct
35 Correct 1 ms 284 KB Output is correct
36 Correct 5 ms 292 KB Output is correct
37 Correct 1 ms 208 KB Output is correct
38 Correct 1 ms 292 KB Output is correct
39 Correct 18 ms 208 KB Output is correct
40 Correct 35 ms 208 KB Output is correct
41 Correct 18 ms 296 KB Output is correct
42 Correct 15 ms 284 KB Output is correct
43 Correct 15 ms 292 KB Output is correct
44 Correct 15 ms 296 KB Output is correct
45 Correct 10 ms 208 KB Output is correct
46 Correct 0 ms 296 KB Output is correct
47 Correct 13 ms 208 KB Output is correct
48 Correct 23 ms 208 KB Output is correct
49 Correct 3 ms 208 KB Output is correct
50 Correct 34 ms 208 KB Output is correct
51 Correct 17 ms 208 KB Output is correct
52 Correct 1 ms 292 KB Output is correct
53 Correct 1 ms 208 KB Output is correct
54 Correct 13 ms 208 KB Output is correct
55 Correct 1 ms 208 KB Output is correct
56 Correct 23 ms 208 KB Output is correct
57 Correct 17 ms 208 KB Output is correct
58 Correct 32 ms 208 KB Output is correct
59 Correct 18 ms 208 KB Output is correct
60 Correct 9 ms 296 KB Output is correct
61 Correct 2 ms 288 KB Output is correct
62 Correct 1 ms 288 KB Output is correct
63 Correct 1 ms 208 KB Output is correct
64 Correct 1 ms 292 KB Output is correct
65 Correct 1 ms 208 KB Output is correct
66 Correct 1 ms 288 KB Output is correct
67 Correct 1 ms 300 KB Output is correct
68 Correct 1 ms 288 KB Output is correct
69 Correct 1 ms 288 KB Output is correct
70 Correct 1 ms 208 KB Output is correct
71 Correct 29 ms 208 KB Output is correct
72 Correct 4 ms 208 KB Output is correct
73 Correct 39 ms 208 KB Output is correct
74 Correct 35 ms 208 KB Output is correct
75 Correct 2 ms 208 KB Output is correct
76 Correct 39 ms 208 KB Output is correct
77 Correct 31 ms 208 KB Output is correct
78 Correct 2 ms 344 KB Output is correct
79 Correct 18 ms 292 KB Output is correct
80 Correct 41 ms 208 KB Output is correct
81 Correct 24 ms 208 KB Output is correct
82 Correct 43 ms 208 KB Output is correct
83 Correct 1 ms 208 KB Output is correct
84 Correct 15 ms 292 KB Output is correct
85 Correct 27 ms 208 KB Output is correct
86 Correct 1 ms 208 KB Output is correct
87 Correct 1 ms 296 KB Output is correct
88 Correct 2 ms 208 KB Output is correct
89 Correct 2 ms 208 KB Output is correct
90 Correct 1 ms 288 KB Output is correct
91 Correct 1 ms 288 KB Output is correct
92 Correct 1 ms 208 KB Output is correct
93 Correct 4 ms 208 KB Output is correct
94 Correct 3 ms 208 KB Output is correct
95 Correct 3 ms 208 KB Output is correct
96 Correct 2 ms 208 KB Output is correct
97 Correct 1 ms 208 KB Output is correct