Submission #766816

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
766816	2023-06-26T07:45:48 Z	danikoynov	The Big Prize (IOI17_prize)	C++14	96.2 / 100	63 ms	1904 KB

prize

#include "prize.h"
#include<bits/stdc++.h>
using namespace std;
map < int, vector < int > > mp;
map < int, int > used;
int cnt = 0;
vector < int > local_ask(int idx)
{
    if (used[idx])
        return mp[idx];
    cnt ++;
    //if (cnt == 1e4)
    //  while(true);
    used[idx] = 1;
    mp[idx] = ask(idx);
    return mp[idx];
}

const int maxn = 2e5 + 10;
vector < int > st;
int best;
void solve_range(int l, int r)
{
    ///cout << l << " " << r << " " << cnt << endl;
    int m = (l + r) / 2;
    vector < int > lf = local_ask(l);
    vector < int > rf = local_ask(r);
    if (lf[1] == rf[1])
        return;
    while(m > l)
    {
        vector < int > mf = local_ask(m);
        if (mf[0] + mf[1] != best)
        {
            st.push_back(m);
            m --;
        }
        else
        {
            break;
        }
    }
    if (m == l)
    {
        m = (l + r) / 2 + 1;
        while(m < r)
        {
            vector < int > mf = local_ask(m);
            if (mf[0] + mf[1] != best)
                st.push_back(m), m ++;
            else
                break;
        }
    }
    if (m == r)
        return;

    vector < int > mf = local_ask(m);
    if (lf[0] != mf[0])
        solve_range(l, m);
    if (rf[0] != mf[0])
        solve_range(m, r);
}
int find_best(int n)
{
    vector < int > idc;
    for (int i = 0; i < n; i ++)
        idc.push_back(i);
    int nec = min(n, (int)sqrt(n) + 50);
    int mx = -1;
    for (int i = 0; i < nec; i ++)
    {
        vector < int > cur = local_ask(i);
        if (cur[0] + cur[1] > best)
        {
            best = cur[0] + cur[1];
            mx = i;
        }
    }
    int pt = n - 1;
    while(true)
    {
        vector < int > cur = local_ask(pt);
        if (cur[0] + cur[1] == best)
            break;
        pt --;
    }


    for (int i = 0; i < mx; i ++)
        st.push_back(i);
    for (int i = pt + 1; i < n; i ++)
        st.push_back(i);
    solve_range(mx, pt);

    //cout << st.size() << " " << cnt << endl;
    for (int i = 0; i < st.size(); i ++)
    {
        vector < int > cur = local_ask(st[i]);
        if (cur[0] + cur[1] == 0)
            return st[i];
    }
    return -1;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:97:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |     for (int i = 0; i < st.size(); i ++)
      |                     ~~^~~~~~~~~~~

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	1352 KB	Output is correct
2	Correct	4 ms	1352 KB	Output is correct
3	Correct	4 ms	1352 KB	Output is correct
4	Correct	3 ms	1428 KB	Output is correct
5	Correct	4 ms	1352 KB	Output is correct
6	Correct	3 ms	1480 KB	Output is correct
7	Correct	3 ms	1352 KB	Output is correct
8	Correct	4 ms	1352 KB	Output is correct
9	Correct	3 ms	1436 KB	Output is correct
10	Correct	4 ms	1352 KB	Output is correct

Subtask #2

76.2 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	1436 KB	Output is correct
2	Correct	4 ms	1432 KB	Output is correct
3	Correct	5 ms	1432 KB	Output is correct
4	Correct	5 ms	1448 KB	Output is correct
5	Correct	3 ms	1440 KB	Output is correct
6	Correct	3 ms	1440 KB	Output is correct
7	Correct	5 ms	1428 KB	Output is correct
8	Correct	5 ms	1432 KB	Output is correct
9	Correct	5 ms	1436 KB	Output is correct
10	Correct	5 ms	1352 KB	Output is correct
11	Correct	6 ms	1352 KB	Output is correct
12	Correct	5 ms	1436 KB	Output is correct
13	Correct	6 ms	1352 KB	Output is correct
14	Correct	11 ms	464 KB	Output is correct
15	Partially correct	42 ms	1840 KB	Partially correct - number of queries: 5030
16	Partially correct	47 ms	1804 KB	Partially correct - number of queries: 5252
17	Partially correct	46 ms	1844 KB	Partially correct - number of queries: 5255
18	Partially correct	38 ms	1844 KB	Partially correct - number of queries: 5253
19	Correct	40 ms	1856 KB	Output is correct
20	Correct	33 ms	1108 KB	Output is correct
21	Partially correct	52 ms	1816 KB	Partially correct - number of queries: 5221
22	Correct	32 ms	1720 KB	Output is correct
23	Correct	3 ms	1440 KB	Output is correct
24	Correct	10 ms	1432 KB	Output is correct
25	Correct	48 ms	1844 KB	Output is correct
26	Correct	31 ms	1764 KB	Output is correct
27	Correct	4 ms	1428 KB	Output is correct
28	Correct	24 ms	1792 KB	Output is correct
29	Correct	28 ms	1668 KB	Output is correct
30	Partially correct	23 ms	1900 KB	Partially correct - number of queries: 5222
31	Partially correct	32 ms	1820 KB	Partially correct - number of queries: 5220
32	Correct	5 ms	1436 KB	Output is correct
33	Correct	1 ms	208 KB	Output is correct
34	Partially correct	49 ms	1808 KB	Partially correct - number of queries: 5258
35	Correct	4 ms	1436 KB	Output is correct
36	Partially correct	44 ms	1872 KB	Partially correct - number of queries: 5221
37	Correct	7 ms	1432 KB	Output is correct
38	Correct	6 ms	1352 KB	Output is correct
39	Partially correct	47 ms	1896 KB	Partially correct - number of queries: 5221
40	Correct	42 ms	1776 KB	Output is correct
41	Partially correct	43 ms	1868 KB	Partially correct - number of queries: 5257
42	Partially correct	36 ms	1880 KB	Partially correct - number of queries: 5257
43	Partially correct	39 ms	1804 KB	Partially correct - number of queries: 5123
44	Partially correct	35 ms	1824 KB	Partially correct - number of queries: 5256
45	Correct	31 ms	1840 KB	Output is correct
46	Partially correct	37 ms	1860 KB	Partially correct - number of queries: 5254
47	Correct	22 ms	1904 KB	Output is correct
48	Partially correct	23 ms	1896 KB	Partially correct - number of queries: 5254
49	Partially correct	47 ms	1844 KB	Partially correct - number of queries: 5253
50	Partially correct	41 ms	1848 KB	Partially correct - number of queries: 5257
51	Partially correct	44 ms	1864 KB	Partially correct - number of queries: 5252
52	Partially correct	41 ms	1836 KB	Partially correct - number of queries: 5255
53	Correct	6 ms	1428 KB	Output is correct
54	Partially correct	51 ms	1804 KB	Partially correct - number of queries: 5226
55	Partially correct	63 ms	1848 KB	Partially correct - number of queries: 5253
56	Partially correct	36 ms	1804 KB	Partially correct - number of queries: 5250
57	Partially correct	48 ms	1804 KB	Partially correct - number of queries: 5219
58	Partially correct	35 ms	1824 KB	Partially correct - number of queries: 5254
59	Partially correct	49 ms	1864 KB	Partially correct - number of queries: 5256
60	Partially correct	50 ms	1852 KB	Partially correct - number of queries: 5220
61	Correct	7 ms	1352 KB	Output is correct
62	Correct	3 ms	1432 KB	Output is correct
63	Correct	7 ms	1372 KB	Output is correct
64	Correct	6 ms	1436 KB	Output is correct
65	Correct	6 ms	1440 KB	Output is correct
66	Correct	10 ms	1436 KB	Output is correct
67	Correct	11 ms	1440 KB	Output is correct
68	Correct	4 ms	1432 KB	Output is correct
69	Correct	8 ms	1432 KB	Output is correct
70	Correct	8 ms	1416 KB	Output is correct
71	Partially correct	47 ms	1884 KB	Partially correct - number of queries: 5256
72	Correct	5 ms	1352 KB	Output is correct
73	Partially correct	42 ms	1780 KB	Partially correct - number of queries: 5193
74	Partially correct	37 ms	1848 KB	Partially correct - number of queries: 5220
75	Correct	6 ms	1432 KB	Output is correct
76	Correct	40 ms	1896 KB	Output is correct
77	Partially correct	50 ms	1836 KB	Partially correct - number of queries: 5374
78	Correct	5 ms	1436 KB	Output is correct
79	Correct	26 ms	1460 KB	Output is correct
80	Partially correct	42 ms	1892 KB	Partially correct - number of queries: 5380
81	Partially correct	38 ms	1840 KB	Partially correct - number of queries: 5364
82	Partially correct	34 ms	1840 KB	Partially correct - number of queries: 5318
83	Correct	6 ms	1352 KB	Output is correct
84	Correct	45 ms	1696 KB	Output is correct
85	Partially correct	35 ms	1784 KB	Partially correct - number of queries: 5337
86	Correct	4 ms	1352 KB	Output is correct
87	Correct	7 ms	1432 KB	Output is correct
88	Correct	6 ms	1352 KB	Output is correct
89	Correct	6 ms	1352 KB	Output is correct
90	Correct	5 ms	1352 KB	Output is correct
91	Correct	6 ms	1352 KB	Output is correct
92	Correct	4 ms	1440 KB	Output is correct
93	Correct	10 ms	1352 KB	Output is correct
94	Correct	9 ms	1352 KB	Output is correct
95	Correct	7 ms	1352 KB	Output is correct
96	Correct	6 ms	1352 KB	Output is correct
97	Correct	5 ms	1352 KB	Output is correct