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Submission #53429

# Submission time Handle Problem Language Result Execution time Memory
53429 2018-06-30T02:17:21 Z fallingstar The Big Prize (IOI17_prize) C++14
20 / 100
 100 ms 10684 KB 
#include <cassert>
#include <iostream>
#include <vector>

using namespace std;

const int N = 2e5 + 2;

vector<int> cache[N];
vector<int> lv(1, 1);

int sumUpper = 0;

vector<int> ask(int i);
int countQuery = 0;
vector<int> Ask(int i)
{
    assert(++countQuery <= 10000);
    return ask(i);
}

inline bool Type(int i) { return cache[i][0] + cache[i][1] == sumUpper; }

int Solve(int l, int r, int cntL, int cntR)
{
    int cur = sumUpper - cntL - cntR;
    
    if (l > r || cur == 0) return -1;
    
    int i = (l + r) / 2;
    while (true)
    {
        if (cache[i].empty()) cache[i] = Ask(i);
        if (cache[i][0] + cache[i][1] == 0) return i;
        if (Type(i)) 
            return max(Solve(l, i - 1, cntL, cache[i][1]), Solve(i + 1, r, cache[i][0], cntR));
        if (i == r) return Solve(l, (l + r) / 2 - 1, cntL, cntR + r - (l + r) / 2 + 1);
        ++i;
    }
    return -1;
}

int find_best(int n)
{
    for (int i = 1, sum = 1; ; ++i)
    {
        int nex = lv.back() * lv.back() + 1;
        if (sum + nex <= n && sum + (long long) nex * nex + 1 <= n)
        {
            lv.push_back(nex);
            sum += nex * nex;
        }
        else
        {
            while (sum + 1 + (nex + 1) * (nex + 1) + 1 <= n) ++nex, ++lv.back();
            break;
        }
    }
    
    
    int upp = 1;
    for (int i = 0; i < (int) lv.size(); ++i)
        upp += lv[i];
    
    for (int i = 0; i < n; ++i)
        if ((i + 1) % (n / upp) == 0) 
        {
            cache[i] = Ask(i);
            sumUpper = max(sumUpper, cache[i][0] + cache[i][1]);
        }
    
    int last = -1, sumL = 0;
    for (int i = 0, need = 0; i < n; ++i)
    {
        if (!cache[i].empty() && cache[i][0] + cache[i][1] == 0) return i;
        need += (i + 1) % (n / upp) == 0;
        need -= !cache[i].empty() && Type(i);
        if (need && cache[i].empty())
        {
            cache[i] = Ask(i);
            --need;
        }
        if (!cache[i].empty() && Type(i))
        {
            int solved = Solve(last + 1, i - 1, sumL, cache[i][1]);
            if (solved != -1) return solved;
            last = i;
            sumL = cache[i][0];
        }
    }
    return Solve(last + 1, n - 1, sumL, 0);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 8 ms 5048 KB Output is correct
3 Correct 8 ms 5048 KB Output is correct
4 Correct 8 ms 5048 KB Output is correct
5 Correct 7 ms 5048 KB Output is correct
6 Correct 7 ms 5132 KB Output is correct
7 Correct 8 ms 5132 KB Output is correct
8 Correct 7 ms 5188 KB Output is correct
9 Correct 8 ms 5256 KB Output is correct
10 Correct 9 ms 5256 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5256 KB Output is correct
2 Correct 8 ms 5256 KB Output is correct
3 Correct 7 ms 5256 KB Output is correct
4 Correct 9 ms 5256 KB Output is correct
5 Correct 7 ms 5308 KB Output is correct
6 Correct 9 ms 5308 KB Output is correct
7 Correct 7 ms 5308 KB Output is correct
8 Correct 8 ms 5308 KB Output is correct
9 Correct 7 ms 5308 KB Output is correct
10 Correct 7 ms 5308 KB Output is correct
11 Correct 9 ms 5308 KB Output is correct
12 Correct 7 ms 5308 KB Output is correct
13 Correct 12 ms 5308 KB Output is correct
14 Correct 7 ms 5308 KB Output is correct
15 Correct 13 ms 5308 KB Output is correct
16 Correct 31 ms 5308 KB Output is correct
17 Correct 8 ms 5308 KB Output is correct
18 Correct 43 ms 5308 KB Output is correct
19 Correct 8 ms 5308 KB Output is correct
20 Correct 15 ms 5308 KB Output is correct
21 Correct 28 ms 5308 KB Output is correct
22 Correct 12 ms 5308 KB Output is correct
23 Correct 8 ms 5308 KB Output is correct
24 Correct 7 ms 5308 KB Output is correct
25 Correct 23 ms 5332 KB Output is correct
26 Correct 23 ms 5332 KB Output is correct
27 Correct 9 ms 5332 KB Output is correct
28 Correct 38 ms 5332 KB Output is correct
29 Correct 36 ms 5332 KB Output is correct
30 Correct 43 ms 5364 KB Output is correct
31 Correct 10 ms 5364 KB Output is correct
32 Correct 11 ms 5364 KB Output is correct
33 Correct 6 ms 5364 KB Output is correct
34 Correct 12 ms 5364 KB Output is correct
35 Correct 8 ms 5364 KB Output is correct
36 Correct 23 ms 5364 KB Output is correct
37 Correct 8 ms 5364 KB Output is correct
38 Correct 10 ms 5364 KB Output is correct
39 Correct 30 ms 5364 KB Output is correct
40 Correct 40 ms 5384 KB Output is correct
41 Correct 29 ms 5384 KB Output is correct
42 Correct 29 ms 5384 KB Output is correct
43 Correct 28 ms 5384 KB Output is correct
44 Correct 21 ms 5452 KB Output is correct
45 Correct 18 ms 5452 KB Output is correct
46 Correct 8 ms 5452 KB Output is correct
47 Correct 25 ms 5452 KB Output is correct
48 Correct 36 ms 5452 KB Output is correct
49 Correct 11 ms 5452 KB Output is correct
50 Correct 38 ms 5452 KB Output is correct
51 Correct 22 ms 5452 KB Output is correct
52 Correct 7 ms 5452 KB Output is correct
53 Correct 10 ms 5452 KB Output is correct
54 Correct 21 ms 5452 KB Output is correct
55 Correct 8 ms 5452 KB Output is correct
56 Correct 40 ms 5452 KB Output is correct
57 Correct 34 ms 5452 KB Output is correct
58 Correct 35 ms 5452 KB Output is correct
59 Correct 27 ms 5452 KB Output is correct
60 Correct 29 ms 5452 KB Output is correct
61 Correct 9 ms 5452 KB Output is correct
62 Correct 7 ms 5452 KB Output is correct
63 Correct 9 ms 5452 KB Output is correct
64 Correct 7 ms 5452 KB Output is correct
65 Correct 8 ms 5452 KB Output is correct
66 Correct 12 ms 5452 KB Output is correct
67 Correct 11 ms 5452 KB Output is correct
68 Correct 8 ms 5452 KB Output is correct
69 Correct 10 ms 5452 KB Output is correct
70 Correct 11 ms 5452 KB Output is correct
71 Correct 49 ms 5452 KB Output is correct
72 Correct 15 ms 5452 KB Output is correct
73 Correct 66 ms 5452 KB Output is correct
74 Correct 44 ms 5452 KB Output is correct
75 Correct 8 ms 5452 KB Output is correct
76 Correct 35 ms 5452 KB Output is correct
77 Correct 26 ms 5452 KB Output is correct
78 Correct 11 ms 5452 KB Output is correct
79 Correct 30 ms 5452 KB Output is correct
80 Correct 39 ms 5452 KB Output is correct
81 Correct 35 ms 5452 KB Output is correct
82 Correct 44 ms 5452 KB Output is correct
83 Correct 9 ms 5452 KB Output is correct
84 Correct 35 ms 5452 KB Output is correct
85 Correct 53 ms 5452 KB Output is correct
86 Runtime error 100 ms 10684 KB Execution killed with signal 11 (could be triggered by violating memory limits)
87 Halted 0 ms 0 KB -