Submission #98440

# Submission time Handle Problem Language Result Execution time Memory
98440 2019-02-23T17:20:36 Z bogdan10bos The Big Prize (IOI17_prize) C++14
94.38 / 100
70 ms 1012 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 < 2 * 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;
         ^~~
# Verdict Execution time Memory Grader output
1 Correct 12 ms 388 KB Output is correct
2 Correct 13 ms 504 KB Output is correct
3 Correct 10 ms 500 KB Output is correct
4 Correct 24 ms 376 KB Output is correct
5 Correct 14 ms 412 KB Output is correct
6 Correct 14 ms 308 KB Output is correct
7 Correct 8 ms 488 KB Output is correct
8 Correct 14 ms 416 KB Output is correct
9 Correct 8 ms 416 KB Output is correct
10 Correct 16 ms 376 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 7 ms 560 KB Output is correct
2 Correct 14 ms 376 KB Output is correct
3 Correct 8 ms 496 KB Output is correct
4 Correct 18 ms 376 KB Output is correct
5 Correct 9 ms 416 KB Output is correct
6 Correct 11 ms 376 KB Output is correct
7 Correct 7 ms 488 KB Output is correct
8 Correct 11 ms 392 KB Output is correct
9 Correct 10 ms 416 KB Output is correct
10 Correct 20 ms 424 KB Output is correct
11 Correct 8 ms 416 KB Output is correct
12 Correct 12 ms 376 KB Output is correct
13 Correct 21 ms 360 KB Output is correct
14 Correct 7 ms 256 KB Output is correct
15 Correct 12 ms 532 KB Output is correct
16 Correct 39 ms 712 KB Output is correct
17 Correct 11 ms 412 KB Output is correct
18 Partially correct 67 ms 788 KB Partially correct - number of queries: 5472
19 Correct 11 ms 376 KB Output is correct
20 Correct 25 ms 504 KB Output is correct
21 Correct 14 ms 544 KB Output is correct
22 Correct 18 ms 444 KB Output is correct
23 Correct 11 ms 392 KB Output is correct
24 Correct 12 ms 376 KB Output is correct
25 Correct 15 ms 576 KB Output is correct
26 Correct 31 ms 552 KB Output is correct
27 Correct 13 ms 380 KB Output is correct
28 Correct 48 ms 784 KB Output is correct
29 Correct 39 ms 832 KB Output is correct
30 Partially correct 64 ms 784 KB Partially correct - number of queries: 5484
31 Correct 13 ms 340 KB Output is correct
32 Correct 20 ms 504 KB Output is correct
33 Correct 3 ms 256 KB Output is correct
34 Correct 20 ms 508 KB Output is correct
35 Correct 8 ms 536 KB Output is correct
36 Correct 21 ms 364 KB Output is correct
37 Correct 14 ms 376 KB Output is correct
38 Correct 12 ms 384 KB Output is correct
39 Correct 19 ms 588 KB Output is correct
40 Correct 47 ms 740 KB Output is correct
41 Correct 22 ms 696 KB Output is correct
42 Correct 36 ms 552 KB Output is correct
43 Correct 18 ms 616 KB Output is correct
44 Correct 22 ms 548 KB Output is correct
45 Correct 30 ms 424 KB Output is correct
46 Correct 7 ms 560 KB Output is correct
47 Correct 29 ms 556 KB Output is correct
48 Correct 48 ms 504 KB Output is correct
49 Correct 17 ms 384 KB Output is correct
50 Partially correct 70 ms 728 KB Partially correct - number of queries: 5477
51 Correct 26 ms 508 KB Output is correct
52 Correct 10 ms 396 KB Output is correct
53 Correct 19 ms 316 KB Output is correct
54 Correct 31 ms 552 KB Output is correct
55 Correct 6 ms 448 KB Output is correct
56 Partially correct 35 ms 1012 KB Partially correct - number of queries: 5480
57 Correct 20 ms 712 KB Output is correct
58 Correct 26 ms 728 KB Output is correct
59 Correct 31 ms 632 KB Output is correct
60 Correct 29 ms 504 KB Output is correct
61 Correct 16 ms 436 KB Output is correct
62 Correct 8 ms 476 KB Output is correct
63 Correct 17 ms 424 KB Output is correct
64 Correct 13 ms 384 KB Output is correct
65 Correct 15 ms 504 KB Output is correct
66 Correct 7 ms 452 KB Output is correct
67 Correct 16 ms 352 KB Output is correct
68 Correct 13 ms 376 KB Output is correct
69 Correct 18 ms 380 KB Output is correct
70 Correct 16 ms 376 KB Output is correct
71 Partially correct 50 ms 724 KB Partially correct - number of queries: 5562
72 Correct 18 ms 516 KB Output is correct
73 Partially correct 61 ms 724 KB Partially correct - number of queries: 5506
74 Partially correct 49 ms 708 KB Partially correct - number of queries: 5530
75 Correct 19 ms 504 KB Output is correct
76 Correct 53 ms 704 KB Output is correct
77 Partially correct 26 ms 912 KB Partially correct - number of queries: 5537
78 Correct 9 ms 512 KB Output is correct
79 Correct 33 ms 604 KB Output is correct
80 Partially correct 66 ms 784 KB Partially correct - number of queries: 5555
81 Partially correct 62 ms 760 KB Partially correct - number of queries: 5496
82 Partially correct 32 ms 856 KB Partially correct - number of queries: 5482
83 Correct 18 ms 376 KB Output is correct
84 Correct 44 ms 700 KB Output is correct
85 Partially correct 36 ms 852 KB Partially correct - number of queries: 5528
86 Correct 9 ms 520 KB Output is correct
87 Correct 10 ms 392 KB Output is correct
88 Correct 17 ms 384 KB Output is correct
89 Correct 15 ms 424 KB Output is correct
90 Correct 12 ms 440 KB Output is correct
91 Correct 9 ms 404 KB Output is correct
92 Correct 18 ms 552 KB Output is correct
93 Correct 22 ms 500 KB Output is correct
94 Correct 15 ms 448 KB Output is correct
95 Correct 14 ms 376 KB Output is correct
96 Correct 18 ms 504 KB Output is correct
97 Correct 14 ms 376 KB Output is correct