Submission #766824

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
766824	2023-06-26T07:48:27 Z	danikoynov	The Big Prize (IOI17_prize)	C++14	96.2 / 100	52 ms	1908 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;
bool done = false;
void solve_range(int l, int r)
{
    if (done)
        return;
    ///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)
        {
            if (mf[0] + mf[1] == 0)
                done = true;
            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)
            {
                            if (mf[0] + mf[1] == 0)
                done = true;
                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:106:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |     for (int i = 0; i < st.size(); i ++)
      |                     ~~^~~~~~~~~~~

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	1352 KB	Output is correct
2	Correct	3 ms	1424 KB	Output is correct
3	Correct	3 ms	1432 KB	Output is correct
4	Correct	5 ms	1436 KB	Output is correct
5	Correct	5 ms	1436 KB	Output is correct
6	Correct	3 ms	1480 KB	Output is correct
7	Correct	5 ms	1436 KB	Output is correct
8	Correct	6 ms	1432 KB	Output is correct
9	Correct	3 ms	1432 KB	Output is correct
10	Correct	6 ms	1352 KB	Output is correct

Subtask #2

76.2 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	1432 KB	Output is correct
2	Correct	4 ms	1480 KB	Output is correct
3	Correct	3 ms	1436 KB	Output is correct
4	Correct	5 ms	1436 KB	Output is correct
5	Correct	7 ms	1352 KB	Output is correct
6	Correct	7 ms	1352 KB	Output is correct
7	Correct	5 ms	1416 KB	Output is correct
8	Correct	5 ms	1436 KB	Output is correct
9	Correct	4 ms	1436 KB	Output is correct
10	Correct	5 ms	1352 KB	Output is correct
11	Correct	8 ms	1436 KB	Output is correct
12	Correct	3 ms	1424 KB	Output is correct
13	Correct	6 ms	1440 KB	Output is correct
14	Correct	4 ms	464 KB	Output is correct
15	Correct	10 ms	1436 KB	Output is correct
16	Correct	42 ms	1732 KB	Output is correct
17	Correct	3 ms	1352 KB	Output is correct
18	Partially correct	25 ms	1860 KB	Partially correct - number of queries: 5253
19	Correct	5 ms	1352 KB	Output is correct
20	Correct	9 ms	932 KB	Output is correct
21	Correct	20 ms	1408 KB	Output is correct
22	Correct	4 ms	1432 KB	Output is correct
23	Correct	3 ms	1352 KB	Output is correct
24	Correct	3 ms	1480 KB	Output is correct
25	Correct	27 ms	1424 KB	Output is correct
26	Correct	20 ms	1468 KB	Output is correct
27	Correct	5 ms	1352 KB	Output is correct
28	Correct	42 ms	1716 KB	Output is correct
29	Correct	35 ms	1588 KB	Output is correct
30	Partially correct	23 ms	1908 KB	Partially correct - number of queries: 5222
31	Correct	3 ms	1436 KB	Output is correct
32	Correct	4 ms	1416 KB	Output is correct
33	Correct	1 ms	208 KB	Output is correct
34	Correct	9 ms	1472 KB	Output is correct
35	Correct	4 ms	1428 KB	Output is correct
36	Correct	14 ms	1352 KB	Output is correct
37	Correct	4 ms	1432 KB	Output is correct
38	Correct	5 ms	1352 KB	Output is correct
39	Correct	12 ms	1496 KB	Output is correct
40	Correct	20 ms	1796 KB	Output is correct
41	Correct	15 ms	1592 KB	Output is correct
42	Correct	29 ms	1596 KB	Output is correct
43	Correct	14 ms	1520 KB	Output is correct
44	Correct	11 ms	1476 KB	Output is correct
45	Correct	18 ms	1432 KB	Output is correct
46	Correct	3 ms	1352 KB	Output is correct
47	Correct	17 ms	1376 KB	Output is correct
48	Correct	33 ms	1680 KB	Output is correct
49	Correct	8 ms	1352 KB	Output is correct
50	Partially correct	23 ms	1908 KB	Partially correct - number of queries: 5257
51	Correct	22 ms	1352 KB	Output is correct
52	Correct	5 ms	1352 KB	Output is correct
53	Correct	7 ms	1440 KB	Output is correct
54	Correct	11 ms	1440 KB	Output is correct
55	Correct	6 ms	1352 KB	Output is correct
56	Partially correct	42 ms	1804 KB	Partially correct - number of queries: 5245
57	Correct	29 ms	1600 KB	Output is correct
58	Correct	36 ms	1680 KB	Output is correct
59	Correct	23 ms	1552 KB	Output is correct
60	Correct	30 ms	1484 KB	Output is correct
61	Correct	6 ms	1436 KB	Output is correct
62	Correct	5 ms	1432 KB	Output is correct
63	Correct	8 ms	1428 KB	Output is correct
64	Correct	5 ms	1432 KB	Output is correct
65	Correct	5 ms	1436 KB	Output is correct
66	Correct	8 ms	1352 KB	Output is correct
67	Correct	5 ms	1472 KB	Output is correct
68	Correct	6 ms	1352 KB	Output is correct
69	Correct	5 ms	1432 KB	Output is correct
70	Correct	9 ms	1432 KB	Output is correct
71	Partially correct	47 ms	1896 KB	Partially correct - number of queries: 5256
72	Correct	11 ms	1352 KB	Output is correct
73	Partially correct	49 ms	1876 KB	Partially correct - number of queries: 5193
74	Partially correct	45 ms	1780 KB	Partially correct - number of queries: 5220
75	Correct	7 ms	1352 KB	Output is correct
76	Correct	30 ms	1768 KB	Output is correct
77	Partially correct	52 ms	1840 KB	Partially correct - number of queries: 5374
78	Correct	14 ms	1440 KB	Output is correct
79	Correct	27 ms	1420 KB	Output is correct
80	Partially correct	46 ms	1852 KB	Partially correct - number of queries: 5380
81	Partially correct	36 ms	1856 KB	Partially correct - number of queries: 5364
82	Partially correct	39 ms	1896 KB	Partially correct - number of queries: 5318
83	Correct	6 ms	1352 KB	Output is correct
84	Correct	39 ms	1700 KB	Output is correct
85	Partially correct	40 ms	1840 KB	Partially correct - number of queries: 5337
86	Correct	5 ms	1352 KB	Output is correct
87	Correct	3 ms	1440 KB	Output is correct
88	Correct	5 ms	1352 KB	Output is correct
89	Correct	4 ms	1352 KB	Output is correct
90	Correct	7 ms	1352 KB	Output is correct
91	Correct	3 ms	1436 KB	Output is correct
92	Correct	6 ms	1352 KB	Output is correct
93	Correct	8 ms	1352 KB	Output is correct
94	Correct	8 ms	1352 KB	Output is correct
95	Correct	7 ms	1352 KB	Output is correct
96	Correct	8 ms	1352 KB	Output is correct
97	Correct	4 ms	1432 KB	Output is correct