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Submission #1118447

# Submission time Handle Problem Language Result Execution time Memory
1118447 2024-11-25T13:51:14 Z adaawf The Big Prize (IOI17_prize) C++17
20 / 100
 164 ms 3968 KB 
#include <bits/stdc++.h>
using namespace std;
int a[200005], cc = 0, hh = 200000, dd[200005], c[200005][10], da[200005];
void build(int n) {
    for (int j = 0; j <= 9; j++) {
        c[0][j] = (a[0] <= j);
        for (int i = 1; i < n; i++) {
            c[i][j] = c[i - 1][j] + (a[i] <= j);
        }
    }
}
mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());
vector<int> ask(int i);
int find_best(int n) {
    vector<pair<int, pair<int, int>>> v;
    vector<int> t;
    int mi = 0;
    if (n <= 180000) {
         for (int i = 0; i < 480; i++) {
            t = ask(i);
            if (t[0] + t[1] == 0) return i;
            mi = max(mi, t[0] + t[1]);
        }
    }
    else {
        for (int i = 0; i < n; i++) da[i] = 0;
        for (int i = 0; i < 352; i++) {
            int h;
            while (1) {
                h = 1ll * (mt() % n) * rand() % n;
                if (da[h] == 1) continue;
                break;
            }
            da[h] = 1;
            t = ask(h);
            if (t[0] + t[1] == 0) return h;
            mi = max(mi, t[0] + t[1]);
        }
    }
    for (int i = 0; i < n; i++) dd[i] = 0;
    int c = 0;
    for (int i = 0; i < n; i += 500) {
        while (1) {
            if (i >= n) break;
            t = ask(i);
            if (t[0] + t[1] == 0) return i;
            if (t[0] + t[1] == mi) {
                break;
            }
            c++;
            i++;
        }
        if (i < n) {
            v.push_back({i, {t[1], c}});
            c = 0;
        }
    }
    v.push_back({n, {0, c}});
    for (int i = 0; i < v.size() - 1; i++) {
        int h = v[i].second.first - v[i + 1].second.first;
        h -= v[i + 1].second.second;
        vector<int> va, vc, vv;
        for (int j = v[i].first; j < min(v[i].first + 500, n + 1); j++) {
            va.push_back(j);
        }
        for (int j = 0; j < h; j++) {
            int l = 0, r = va.size() - 1, res;
            while (1) {
                int mid = (l + r) / 2;
                res = va[mid];
                dd[va[mid]] = 1;
                t = ask(va[mid]);
                if (t[0] + t[1] == 0) return va[mid];
                if (t[0] + t[1] != mi) break;
                for (int w : vc) {
                    if (w <= va[mid]) t[1]++;
                }
                if (t[1] == v[i].second.first) {
                    l = mid + 1;
                }
                else r = mid - 1;
            }
            vc.push_back(res);
            vv.clear();
            for (int w : va) {
                if (dd[w] == 0) vv.push_back(w);
            }
            va = vv;
        }
    }
    return -1;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     for (int i = 0; i < v.size() - 1; i++) {
      |                     ~~^~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 3456 KB Output is correct
2 Correct 14 ms 3420 KB Output is correct
3 Correct 15 ms 3472 KB Output is correct
4 Correct 13 ms 3420 KB Output is correct
5 Correct 11 ms 3928 KB Output is correct
6 Correct 8 ms 3440 KB Output is correct
7 Correct 10 ms 3456 KB Output is correct
8 Correct 11 ms 3704 KB Output is correct
9 Correct 14 ms 3676 KB Output is correct
10 Correct 15 ms 3732 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 3420 KB Output is correct
2 Correct 13 ms 3420 KB Output is correct
3 Correct 13 ms 3420 KB Output is correct
4 Correct 13 ms 3420 KB Output is correct
5 Correct 10 ms 3468 KB Output is correct
6 Correct 8 ms 3452 KB Output is correct
7 Correct 11 ms 3420 KB Output is correct
8 Correct 10 ms 3420 KB Output is correct
9 Correct 13 ms 3444 KB Output is correct
10 Correct 15 ms 3664 KB Output is correct
11 Correct 15 ms 3472 KB Output is correct
12 Correct 16 ms 3408 KB Output is correct
13 Correct 17 ms 3444 KB Output is correct
14 Correct 13 ms 592 KB Output is correct
15 Correct 24 ms 3264 KB Output is correct
16 Correct 67 ms 3420 KB Output is correct
17 Correct 16 ms 3444 KB Output is correct
18 Correct 66 ms 3444 KB Output is correct
19 Correct 11 ms 3456 KB Output is correct
20 Correct 27 ms 1004 KB Output is correct
21 Correct 37 ms 3472 KB Output is correct
22 Correct 19 ms 3720 KB Output is correct
23 Correct 14 ms 3692 KB Output is correct
24 Correct 12 ms 3664 KB Output is correct
25 Correct 44 ms 3924 KB Output is correct
26 Correct 46 ms 3408 KB Output is correct
27 Correct 14 ms 3700 KB Output is correct
28 Correct 65 ms 3400 KB Output is correct
29 Correct 50 ms 3460 KB Output is correct
30 Correct 76 ms 3952 KB Output is correct
31 Correct 13 ms 3580 KB Output is correct
32 Correct 17 ms 3472 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 28 ms 3472 KB Output is correct
35 Correct 17 ms 3700 KB Output is correct
36 Correct 30 ms 3408 KB Output is correct
37 Correct 16 ms 3460 KB Output is correct
38 Correct 14 ms 3408 KB Output is correct
39 Correct 29 ms 3468 KB Output is correct
40 Correct 83 ms 3408 KB Output is correct
41 Correct 46 ms 3700 KB Output is correct
42 Correct 50 ms 3464 KB Output is correct
43 Correct 49 ms 3456 KB Output is correct
44 Correct 41 ms 3704 KB Output is correct
45 Correct 38 ms 3920 KB Output is correct
46 Correct 15 ms 3408 KB Output is correct
47 Correct 30 ms 3408 KB Output is correct
48 Correct 47 ms 3460 KB Output is correct
49 Correct 20 ms 3468 KB Output is correct
50 Correct 79 ms 3444 KB Output is correct
51 Correct 40 ms 3552 KB Output is correct
52 Correct 13 ms 3420 KB Output is correct
53 Correct 13 ms 3480 KB Output is correct
54 Correct 43 ms 3968 KB Output is correct
55 Correct 13 ms 3408 KB Output is correct
56 Correct 71 ms 3712 KB Output is correct
57 Correct 57 ms 3408 KB Output is correct
58 Correct 64 ms 3408 KB Output is correct
59 Correct 56 ms 3700 KB Output is correct
60 Correct 49 ms 3920 KB Output is correct
61 Correct 18 ms 3428 KB Output is correct
62 Correct 15 ms 3408 KB Output is correct
63 Correct 15 ms 3684 KB Output is correct
64 Correct 13 ms 3408 KB Output is correct
65 Correct 15 ms 3696 KB Output is correct
66 Correct 21 ms 3440 KB Output is correct
67 Correct 19 ms 3468 KB Output is correct
68 Correct 13 ms 3408 KB Output is correct
69 Correct 20 ms 3704 KB Output is correct
70 Correct 16 ms 3444 KB Output is correct
71 Correct 93 ms 3700 KB Output is correct
72 Correct 23 ms 3408 KB Output is correct
73 Correct 90 ms 3420 KB Output is correct
74 Correct 74 ms 3676 KB Output is correct
75 Correct 15 ms 3712 KB Output is correct
76 Correct 64 ms 3408 KB Output is correct
77 Correct 73 ms 3712 KB Output is correct
78 Correct 16 ms 3408 KB Output is correct
79 Correct 41 ms 3696 KB Output is correct
80 Correct 78 ms 3444 KB Output is correct
81 Correct 83 ms 3664 KB Output is correct
82 Correct 73 ms 3704 KB Output is correct
83 Correct 16 ms 3664 KB Output is correct
84 Correct 68 ms 3664 KB Output is correct
85 Correct 82 ms 3244 KB Output is correct
86 Correct 56 ms 3472 KB Output is correct
87 Correct 14 ms 3716 KB Output is correct
88 Correct 52 ms 3440 KB Output is correct
89 Correct 30 ms 3676 KB Output is correct
90 Correct 15 ms 3676 KB Output is correct
91 Correct 24 ms 3664 KB Output is correct
92 Correct 33 ms 3444 KB Output is correct
93 Incorrect 164 ms 3416 KB Incorrect
94 Halted 0 ms 0 KB -