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Submission #464778

# Submission time Handle Problem Language Result Execution time Memory
464778 2021-08-14T03:28:47 Z hellowsdf The Big Prize (IOI17_prize) C++14
100 / 100
 65 ms 5480 KB 
#include "prize.h"
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;

vector<int> res[202020];
bool visited[202020];

int worst_sum = 0;

vector<int> query(int pos) {
    if (visited[pos]) return res[pos];
    visited[pos] = true;
    res[pos] = ask(pos);
    if (res[pos][0] + res[pos][1] == 0) throw pos;
    return res[pos];
}

void binary_search(int l, int r, int nl, int nr) {
    FOR(i, 0, r - l + 1) {
        int mid, midl = (l + r) / 2 - i / 2, midr = (l + r) / 2 + (i + 1) / 2;
        if (i & 1)
            mid = midr;
        else
            mid = midl;

        vector<int> x = query(mid);
        if (x[0] + x[1] == worst_sum) {
            int xl = (i & 1 ? midr - midl : 0), xr = (i & 1 ? 0 : midr - midl);
            if (x[0] - xl > nl) binary_search(l, midl - 1, nl, x[1] + xl);
            if (x[1] - xr > nr) binary_search(midr + 1, r, x[0] + xr, nr);
            break;
        }
    }
}

int find_best(int n) {
    try {
        int p = 0;
        for (int i = 0; i < 474 && i < n && worst_sum < 27; i++) {
            vector<int> x = query(i);
            if (x[0] + x[1] > worst_sum) p = i, worst_sum = x[0] + x[1];
        }
        binary_search(p, n - 1, p, 0);
    } catch (int ans) {
        return ans;
    }

    return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5032 KB Output is correct
2 Correct 10 ms 5036 KB Output is correct
3 Correct 11 ms 5128 KB Output is correct
4 Correct 11 ms 5056 KB Output is correct
5 Correct 9 ms 5056 KB Output is correct
6 Correct 5 ms 5032 KB Output is correct
7 Correct 9 ms 5056 KB Output is correct
8 Correct 8 ms 5048 KB Output is correct
9 Correct 10 ms 5028 KB Output is correct
10 Correct 9 ms 5084 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5072 KB Output is correct
2 Correct 10 ms 5036 KB Output is correct
3 Correct 11 ms 5040 KB Output is correct
4 Correct 11 ms 5132 KB Output is correct
5 Correct 12 ms 5036 KB Output is correct
6 Correct 5 ms 5064 KB Output is correct
7 Correct 12 ms 5012 KB Output is correct
8 Correct 10 ms 5052 KB Output is correct
9 Correct 10 ms 5028 KB Output is correct
10 Correct 10 ms 5044 KB Output is correct
11 Correct 6 ms 5220 KB Output is correct
12 Correct 5 ms 5036 KB Output is correct
13 Correct 10 ms 5284 KB Output is correct
14 Correct 6 ms 5064 KB Output is correct
15 Correct 12 ms 5160 KB Output is correct
16 Correct 23 ms 5292 KB Output is correct
17 Correct 5 ms 5064 KB Output is correct
18 Correct 25 ms 5380 KB Output is correct
19 Correct 6 ms 5028 KB Output is correct
20 Correct 18 ms 5084 KB Output is correct
21 Correct 13 ms 5144 KB Output is correct
22 Correct 9 ms 5028 KB Output is correct
23 Correct 7 ms 5072 KB Output is correct
24 Correct 5 ms 5064 KB Output is correct
25 Correct 32 ms 5280 KB Output is correct
26 Correct 25 ms 5184 KB Output is correct
27 Correct 10 ms 5064 KB Output is correct
28 Correct 40 ms 5280 KB Output is correct
29 Correct 42 ms 5260 KB Output is correct
30 Correct 54 ms 5428 KB Output is correct
31 Correct 5 ms 5064 KB Output is correct
32 Correct 9 ms 5152 KB Output is correct
33 Correct 5 ms 5064 KB Output is correct
34 Correct 19 ms 5192 KB Output is correct
35 Correct 9 ms 5240 KB Output is correct
36 Correct 10 ms 5116 KB Output is correct
37 Correct 6 ms 5064 KB Output is correct
38 Correct 11 ms 5036 KB Output is correct
39 Correct 14 ms 5156 KB Output is correct
40 Correct 23 ms 5312 KB Output is correct
41 Correct 33 ms 5184 KB Output is correct
42 Correct 16 ms 5224 KB Output is correct
43 Correct 34 ms 5184 KB Output is correct
44 Correct 23 ms 5200 KB Output is correct
45 Correct 12 ms 5244 KB Output is correct
46 Correct 5 ms 5060 KB Output is correct
47 Correct 23 ms 5188 KB Output is correct
48 Correct 47 ms 5288 KB Output is correct
49 Correct 10 ms 5036 KB Output is correct
50 Correct 29 ms 5340 KB Output is correct
51 Correct 25 ms 5172 KB Output is correct
52 Correct 5 ms 5056 KB Output is correct
53 Correct 12 ms 5184 KB Output is correct
54 Correct 16 ms 5156 KB Output is correct
55 Correct 6 ms 5064 KB Output is correct
56 Correct 49 ms 5356 KB Output is correct
57 Correct 49 ms 5308 KB Output is correct
58 Correct 34 ms 5308 KB Output is correct
59 Correct 29 ms 5184 KB Output is correct
60 Correct 25 ms 5212 KB Output is correct
61 Correct 13 ms 5152 KB Output is correct
62 Correct 11 ms 5052 KB Output is correct
63 Correct 10 ms 5184 KB Output is correct
64 Correct 12 ms 5152 KB Output is correct
65 Correct 5 ms 5132 KB Output is correct
66 Correct 11 ms 5056 KB Output is correct
67 Correct 7 ms 5064 KB Output is correct
68 Correct 9 ms 5036 KB Output is correct
69 Correct 9 ms 5068 KB Output is correct
70 Correct 7 ms 5016 KB Output is correct
71 Correct 55 ms 5424 KB Output is correct
72 Correct 11 ms 5192 KB Output is correct
73 Correct 65 ms 5336 KB Output is correct
74 Correct 63 ms 5480 KB Output is correct
75 Correct 10 ms 5180 KB Output is correct
76 Correct 45 ms 5344 KB Output is correct
77 Correct 55 ms 5388 KB Output is correct
78 Correct 11 ms 5288 KB Output is correct
79 Correct 31 ms 5248 KB Output is correct
80 Correct 59 ms 5364 KB Output is correct
81 Correct 61 ms 5312 KB Output is correct
82 Correct 58 ms 5316 KB Output is correct
83 Correct 12 ms 5184 KB Output is correct
84 Correct 37 ms 5440 KB Output is correct
85 Correct 40 ms 5312 KB Output is correct
86 Correct 10 ms 5064 KB Output is correct
87 Correct 5 ms 5064 KB Output is correct
88 Correct 11 ms 5048 KB Output is correct
89 Correct 10 ms 5056 KB Output is correct
90 Correct 10 ms 5064 KB Output is correct
91 Correct 8 ms 5036 KB Output is correct
92 Correct 9 ms 5064 KB Output is correct
93 Correct 13 ms 5196 KB Output is correct
94 Correct 14 ms 5184 KB Output is correct
95 Correct 12 ms 5196 KB Output is correct
96 Correct 15 ms 5148 KB Output is correct
97 Correct 9 ms 5064 KB Output is correct