oj.uz

Submission #98439

# Submission time Handle Problem Language Result Execution time Memory
98439 2019-02-23T17:14:37 Z bogdan10bos The Big Prize (IOI17_prize) C++14
20 / 100
 81 ms 1296 KB 
#include <bits/stdc++.h>

#include "prize.h"

using namespace std;

typedef pair<int, int> pii;

int sq, mxcnt, ans;
map<int, int> mp[2];

pii myask(int pos)
{
    if(mp[0].count(pos))
        return {mp[0][pos], mp[1][pos]};

    auto v = ask(pos);
    mp[0][pos] = v[0];
    mp[1][pos] = v[1];
    return {v[0], v[1]};
}

void solve(int st, int dr)
{
    if(st > dr) return;
    if(ans != -1)   return;
    auto askst = myask(st);
    auto askdr = myask(dr);

    int sumst = askst.first + askst.second;
    int sumdr = askdr.first + askdr.second;

    if(sumst == 0)  { ans = st; return; }
    if(sumdr == 0)  { ans = dr; return; }

    if(askst.second == 0 || askdr.first == 0)   return;

    if(dr - st <= 1)    return;

    if(sumst != mxcnt)
    {
        solve(st + 1, dr);
        return;
    }

    if(sumdr != mxcnt)
    {
        solve(st, dr - 1);
        return;
    }

    int cnt = askdr.first - askst.first;
    if(cnt == 0)    return;

    int lgt = dr - st - 1;

    int mij = st + (dr - st) / 2;

    solve(st, mij);
    solve(mij, dr);
}

int find_best(int N)
{
    ans = -1;
    sq = sqrt(N) + 1;
    sq = min(sq, N);
    mxcnt = 0;
	for(int i = 0; i < sq; i++)
    {
        auto x = myask(i);
        int sum = x.first + x.second;
        if(sum == 0)    ans = i;
        mxcnt = max(mxcnt, sum);
    }
    int st = 0, dr = sq;
    for(; st < N; )
    {
        solve(st, dr);
        st += sq; dr += sq;
        if(dr >= N) dr = N - 1;
    }
    return ans;
}

Compilation message

prize.cpp: In function 'void solve(int, int)':
prize.cpp:55:9: warning: unused variable 'lgt' [-Wunused-variable]
     int lgt = dr - st - 1;
         ^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 256 KB Output is correct
2 Correct 5 ms 480 KB Output is correct
3 Correct 5 ms 360 KB Output is correct
4 Correct 10 ms 376 KB Output is correct
5 Correct 9 ms 376 KB Output is correct
6 Correct 4 ms 424 KB Output is correct
7 Correct 9 ms 256 KB Output is correct
8 Correct 5 ms 572 KB Output is correct
9 Correct 15 ms 376 KB Output is correct
10 Correct 7 ms 404 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 336 KB Output is correct
2 Correct 5 ms 364 KB Output is correct
3 Correct 5 ms 360 KB Output is correct
4 Correct 9 ms 384 KB Output is correct
5 Correct 8 ms 384 KB Output is correct
6 Correct 6 ms 256 KB Output is correct
7 Correct 8 ms 384 KB Output is correct
8 Correct 10 ms 256 KB Output is correct
9 Correct 5 ms 440 KB Output is correct
10 Correct 9 ms 384 KB Output is correct
11 Correct 8 ms 360 KB Output is correct
12 Correct 6 ms 304 KB Output is correct
13 Correct 14 ms 376 KB Output is correct
14 Correct 7 ms 256 KB Output is correct
15 Correct 16 ms 376 KB Output is correct
16 Correct 26 ms 788 KB Output is correct
17 Correct 7 ms 316 KB Output is correct
18 Partially correct 52 ms 760 KB Partially correct - number of queries: 5033
19 Correct 8 ms 456 KB Output is correct
20 Correct 16 ms 376 KB Output is correct
21 Correct 24 ms 488 KB Output is correct
22 Correct 10 ms 376 KB Output is correct
23 Correct 9 ms 384 KB Output is correct
24 Correct 4 ms 536 KB Output is correct
25 Correct 16 ms 616 KB Output is correct
26 Correct 27 ms 504 KB Output is correct
27 Correct 10 ms 256 KB Output is correct
28 Correct 45 ms 676 KB Output is correct
29 Correct 36 ms 572 KB Output is correct
30 Partially correct 68 ms 680 KB Partially correct - number of queries: 5046
31 Correct 8 ms 384 KB Output is correct
32 Correct 11 ms 304 KB Output is correct
33 Correct 2 ms 256 KB Output is correct
34 Correct 11 ms 448 KB Output is correct
35 Correct 6 ms 488 KB Output is correct
36 Correct 15 ms 376 KB Output is correct
37 Correct 5 ms 476 KB Output is correct
38 Correct 8 ms 384 KB Output is correct
39 Correct 13 ms 600 KB Output is correct
40 Correct 38 ms 688 KB Output is correct
41 Correct 17 ms 584 KB Output is correct
42 Correct 18 ms 588 KB Output is correct
43 Correct 35 ms 556 KB Output is correct
44 Correct 26 ms 432 KB Output is correct
45 Correct 14 ms 424 KB Output is correct
46 Correct 7 ms 256 KB Output is correct
47 Correct 31 ms 424 KB Output is correct
48 Correct 42 ms 632 KB Output is correct
49 Correct 9 ms 304 KB Output is correct
50 Partially correct 47 ms 848 KB Partially correct - number of queries: 5038
51 Correct 27 ms 504 KB Output is correct
52 Correct 7 ms 444 KB Output is correct
53 Correct 14 ms 308 KB Output is correct
54 Correct 18 ms 460 KB Output is correct
55 Correct 4 ms 336 KB Output is correct
56 Partially correct 50 ms 684 KB Partially correct - number of queries: 5041
57 Correct 33 ms 640 KB Output is correct
58 Correct 40 ms 664 KB Output is correct
59 Correct 21 ms 648 KB Output is correct
60 Correct 22 ms 648 KB Output is correct
61 Correct 15 ms 384 KB Output is correct
62 Correct 6 ms 256 KB Output is correct
63 Correct 11 ms 528 KB Output is correct
64 Correct 5 ms 448 KB Output is correct
65 Correct 6 ms 432 KB Output is correct
66 Correct 14 ms 376 KB Output is correct
67 Correct 13 ms 376 KB Output is correct
68 Correct 7 ms 384 KB Output is correct
69 Correct 13 ms 432 KB Output is correct
70 Correct 11 ms 376 KB Output is correct
71 Partially correct 44 ms 760 KB Partially correct - number of queries: 5116
72 Correct 15 ms 404 KB Output is correct
73 Partially correct 24 ms 852 KB Partially correct - number of queries: 5060
74 Partially correct 44 ms 820 KB Partially correct - number of queries: 5084
75 Correct 15 ms 376 KB Output is correct
76 Correct 46 ms 704 KB Output is correct
77 Partially correct 49 ms 732 KB Partially correct - number of queries: 5088
78 Correct 15 ms 296 KB Output is correct
79 Correct 34 ms 560 KB Output is correct
80 Partially correct 59 ms 684 KB Partially correct - number of queries: 5076
81 Partially correct 41 ms 764 KB Partially correct - number of queries: 5076
82 Partially correct 57 ms 664 KB Partially correct - number of queries: 5086
83 Correct 11 ms 376 KB Output is correct
84 Correct 47 ms 792 KB Output is correct
85 Partially correct 28 ms 760 KB Partially correct - number of queries: 5045
86 Incorrect 81 ms 1296 KB Incorrect
87 Halted 0 ms 0 KB -