Submission #757800

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
757800	2023-06-13T18:36:24 Z	borisAngelov	The Big Prize (IOI17_prize)	C++17	97.75 / 100	61 ms	5288 KB

prize

#include "prize.h"

#include <iostream>
#include <vector>
#include <random>
#include <ctime>

using namespace std;

const int maxn = 200005;

int N;

int max_result = 0;

vector<int> results[maxn];

int divide(int l, int r, int removed_from_left, int removed_from_right)
{
    if (l > r)
    {
        return 0;
    }

    int mid = (l + r) / 2;
    vector<int> curr;

    while (mid <= r)
    {
        //curr = ask(mid);

        if (!results[mid].empty())
        {
            curr = results[mid];
        }
        else
        {
            curr = ask(mid);
            results[mid].push_back(curr[0]);
            results[mid].push_back(curr[1]);
        }

        if (curr[0] + curr[1] == 0)
        {
            return mid;
        }

        if (curr[0] + curr[1] == max_result)
        {
            break;
        }

        ++mid;
    }

    if (mid <= r)
    {
        curr[0] -= (removed_from_left - (mid - (l + r) / 2));
        curr[1] -= removed_from_right;

        if (curr[0] > 0)
        {
            int idx = divide(l, (l + r) / 2 - 1, removed_from_left, removed_from_right + curr[1] + (mid - (l + r) / 2));

            if (idx != 0)
            {
                return idx;
            }
        }

        if (curr[1] > 0)
        {
            int idx = divide(mid + 1, r, removed_from_left + curr[0] + (mid - (l + r) / 2), removed_from_right);

            if (idx != 0)
            {
                return idx;
            }
        }

        return 0;
    }
    else
    {
        mid = (l + r) / 2 - 1;

        while (mid >= l)
        {
            if (!results[mid].empty())
            {
                curr = results[mid];
            }
            else
            {
                curr = ask(mid);
                results[mid].push_back(curr[0]);
                results[mid].push_back(curr[1]);
            }

            if (curr[0] + curr[1] == 0)
            {
                return mid;
            }

            if (curr[0] + curr[1] == max_result)
            {
                return mid;
            }

            --mid;
        }

        if (mid == l - 1)
        {
            return 0;
        }

        curr[0] -= removed_from_left;

        if (curr[0] > 0)
        {
            return divide(l, mid - 1, removed_from_left, removed_from_right + (r - mid));
        }

        return 0;
    }

    return 0;
}

int find_best(int n)
{
    N = n;

    for (int i = 0; i < 470; ++i)
    {
        int idx = rand() % n;

        while (!results[idx].empty())
        {
            idx = rand() % n;
        }

        vector<int> curr_result = ask(idx);

        results[idx].push_back(curr_result[0]);
        results[idx].push_back(curr_result[1]);

        if (curr_result[0] + curr_result[1] == 0)
        {
            return idx;
        }

        max_result = max(max_result, curr_result[0] + curr_result[1]);
    }

    return divide(0, N - 1, 0, 0);
}

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	4996 KB	Output is correct
2	Correct	5 ms	4944 KB	Output is correct
3	Correct	6 ms	4944 KB	Output is correct
4	Correct	5 ms	5000 KB	Output is correct
5	Correct	6 ms	4996 KB	Output is correct
6	Correct	8 ms	5000 KB	Output is correct
7	Correct	5 ms	5000 KB	Output is correct
8	Correct	9 ms	4988 KB	Output is correct
9	Correct	7 ms	4992 KB	Output is correct
10	Correct	7 ms	4944 KB	Output is correct

Subtask #2

77.75 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	4988 KB	Output is correct
2	Correct	7 ms	4992 KB	Output is correct
3	Correct	8 ms	4944 KB	Output is correct
4	Correct	4 ms	5004 KB	Output is correct
5	Correct	6 ms	4944 KB	Output is correct
6	Correct	9 ms	4992 KB	Output is correct
7	Correct	6 ms	5084 KB	Output is correct
8	Correct	8 ms	4984 KB	Output is correct
9	Correct	7 ms	4980 KB	Output is correct
10	Correct	5 ms	5012 KB	Output is correct
11	Correct	10 ms	4980 KB	Output is correct
12	Correct	8 ms	4992 KB	Output is correct
13	Correct	13 ms	4988 KB	Output is correct
14	Correct	9 ms	5072 KB	Output is correct
15	Correct	15 ms	4944 KB	Output is correct
16	Correct	4 ms	4992 KB	Output is correct
17	Correct	9 ms	4992 KB	Output is correct
18	Partially correct	57 ms	5064 KB	Partially correct - number of queries: 5073
19	Correct	8 ms	4996 KB	Output is correct
20	Correct	11 ms	5036 KB	Output is correct
21	Correct	25 ms	5016 KB	Output is correct
22	Correct	13 ms	5016 KB	Output is correct
23	Correct	6 ms	4944 KB	Output is correct
24	Correct	6 ms	4944 KB	Output is correct
25	Correct	23 ms	4996 KB	Output is correct
26	Correct	32 ms	5016 KB	Output is correct
27	Correct	7 ms	4992 KB	Output is correct
28	Correct	56 ms	5288 KB	Output is correct
29	Correct	26 ms	5004 KB	Output is correct
30	Partially correct	53 ms	5116 KB	Partially correct - number of queries: 5054
31	Correct	7 ms	4944 KB	Output is correct
32	Correct	8 ms	4992 KB	Output is correct
33	Correct	3 ms	4944 KB	Output is correct
34	Correct	10 ms	5036 KB	Output is correct
35	Correct	7 ms	4992 KB	Output is correct
36	Correct	17 ms	5008 KB	Output is correct
37	Correct	8 ms	4944 KB	Output is correct
38	Correct	10 ms	5000 KB	Output is correct
39	Correct	24 ms	5052 KB	Output is correct
40	Correct	52 ms	5004 KB	Output is correct
41	Correct	34 ms	5000 KB	Output is correct
42	Correct	25 ms	4972 KB	Output is correct
43	Correct	29 ms	5048 KB	Output is correct
44	Correct	27 ms	5044 KB	Output is correct
45	Correct	10 ms	5036 KB	Output is correct
46	Correct	10 ms	4988 KB	Output is correct
47	Correct	30 ms	5036 KB	Output is correct
48	Correct	32 ms	5064 KB	Output is correct
49	Correct	11 ms	4944 KB	Output is correct
50	Partially correct	41 ms	5080 KB	Partially correct - number of queries: 5088
51	Correct	19 ms	4980 KB	Output is correct
52	Correct	7 ms	4988 KB	Output is correct
53	Correct	9 ms	5000 KB	Output is correct
54	Correct	20 ms	5020 KB	Output is correct
55	Correct	5 ms	4944 KB	Output is correct
56	Partially correct	35 ms	5132 KB	Partially correct - number of queries: 5089
57	Correct	36 ms	4976 KB	Output is correct
58	Correct	34 ms	5044 KB	Output is correct
59	Correct	35 ms	5040 KB	Output is correct
60	Correct	23 ms	5064 KB	Output is correct
61	Correct	8 ms	4968 KB	Output is correct
62	Correct	8 ms	5132 KB	Output is correct
63	Correct	7 ms	4996 KB	Output is correct
64	Correct	8 ms	4992 KB	Output is correct
65	Correct	6 ms	4944 KB	Output is correct
66	Correct	9 ms	4972 KB	Output is correct
67	Correct	8 ms	5116 KB	Output is correct
68	Correct	8 ms	4988 KB	Output is correct
69	Correct	9 ms	4944 KB	Output is correct
70	Correct	9 ms	5124 KB	Output is correct
71	Partially correct	46 ms	5156 KB	Partially correct - number of queries: 5207
72	Correct	12 ms	5076 KB	Output is correct
73	Partially correct	53 ms	5192 KB	Partially correct - number of queries: 5146
74	Partially correct	61 ms	5064 KB	Partially correct - number of queries: 5173
75	Correct	9 ms	5016 KB	Output is correct
76	Correct	44 ms	5072 KB	Output is correct
77	Partially correct	26 ms	5028 KB	Partially correct - number of queries: 5161
78	Correct	12 ms	5012 KB	Output is correct
79	Correct	24 ms	5056 KB	Output is correct
80	Partially correct	31 ms	5068 KB	Partially correct - number of queries: 5158
81	Partially correct	56 ms	5132 KB	Partially correct - number of queries: 5146
82	Partially correct	46 ms	5060 KB	Partially correct - number of queries: 5141
83	Correct	9 ms	5016 KB	Output is correct
84	Correct	54 ms	5108 KB	Output is correct
85	Partially correct	46 ms	5244 KB	Partially correct - number of queries: 5225
86	Correct	32 ms	5008 KB	Output is correct
87	Correct	11 ms	4944 KB	Output is correct
88	Correct	26 ms	5008 KB	Output is correct
89	Correct	15 ms	5120 KB	Output is correct
90	Correct	7 ms	5012 KB	Output is correct
91	Correct	16 ms	5016 KB	Output is correct
92	Correct	35 ms	5056 KB	Output is correct
93	Correct	38 ms	5028 KB	Output is correct
94	Correct	41 ms	5064 KB	Output is correct
95	Correct	22 ms	5108 KB	Output is correct
96	Correct	43 ms	5140 KB	Output is correct
97	Correct	33 ms	5092 KB	Output is correct