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Submission #1118469

# Submission time Handle Problem Language Result Execution time Memory
1118469 2024-11-25T14:15:46 Z adaawf The Big Prize (IOI17_prize) C++17
20 / 100
 153 ms 3728 KB 
#include <bits/stdc++.h>
using namespace std;
int a[200005], cc = 0, hh = 200000, dd[200005], c[200005][10], da[200005], b = 480;
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 <= 170000) {
         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 < 440; i++) {
            int h;
            while (1) {
                h = 1ll * (mt() % n) % 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] = da[i] = 0;
    int c = 0;
    for (int i = 0; i < n; i += b) {
        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}});
    vector<int> vb, vvb;
    for (int i = 0; i < v.size() - 1; i++) vb.push_back(i);
    for (int i = 0; i < vb.size(); i++) {
        int h = mt() % (vb.size() - i) + 1;
        for (int j = 0; j < vb.size(); j++) {
            if (da[j] == 0) {
                h--;
                if (h == 0) {
                    vvb.push_back(vb[j]);
                    da[j] = 1;
                    break;
                }
            }
        }
    }
    for (int i : vvb) {
        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 + b, 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:60:23: 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]
   60 |     for (int i = 0; i < v.size() - 1; i++) vb.push_back(i);
      |                     ~~^~~~~~~~~~~~~~
prize.cpp:61:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for (int i = 0; i < vb.size(); i++) {
      |                     ~~^~~~~~~~~~~
prize.cpp:63:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         for (int j = 0; j < vb.size(); j++) {
      |                         ~~^~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 3712 KB Output is correct
2 Correct 15 ms 3448 KB Output is correct
3 Correct 16 ms 3728 KB Output is correct
4 Correct 15 ms 3476 KB Output is correct
5 Correct 16 ms 2040 KB Output is correct
6 Correct 8 ms 1884 KB Output is correct
7 Correct 15 ms 1884 KB Output is correct
8 Correct 14 ms 2020 KB Output is correct
9 Correct 18 ms 2016 KB Output is correct
10 Correct 16 ms 2016 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 2256 KB Output is correct
2 Correct 17 ms 2020 KB Output is correct
3 Correct 15 ms 2128 KB Output is correct
4 Correct 17 ms 2008 KB Output is correct
5 Correct 17 ms 3444 KB Output is correct
6 Correct 8 ms 3668 KB Output is correct
7 Correct 15 ms 3456 KB Output is correct
8 Correct 16 ms 2128 KB Output is correct
9 Correct 16 ms 2252 KB Output is correct
10 Correct 18 ms 2032 KB Output is correct
11 Correct 18 ms 2028 KB Output is correct
12 Correct 17 ms 2280 KB Output is correct
13 Correct 15 ms 1872 KB Output is correct
14 Correct 12 ms 456 KB Output is correct
15 Correct 18 ms 2028 KB Output is correct
16 Correct 5 ms 1104 KB Output is correct
17 Correct 54 ms 1872 KB Output is correct
18 Correct 28 ms 2276 KB Output is correct
19 Correct 64 ms 2288 KB Output is correct
20 Correct 36 ms 3084 KB Output is correct
21 Correct 29 ms 3456 KB Output is correct
22 Correct 53 ms 3408 KB Output is correct
23 Correct 17 ms 2128 KB Output is correct
24 Correct 16 ms 1872 KB Output is correct
25 Correct 34 ms 2292 KB Output is correct
26 Correct 33 ms 2288 KB Output is correct
27 Correct 17 ms 3456 KB Output is correct
28 Correct 22 ms 2032 KB Output is correct
29 Correct 47 ms 2040 KB Output is correct
30 Correct 61 ms 2384 KB Output is correct
31 Correct 56 ms 1876 KB Output is correct
32 Correct 18 ms 3464 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 28 ms 3256 KB Output is correct
35 Correct 13 ms 3668 KB Output is correct
36 Correct 73 ms 2528 KB Output is correct
37 Correct 15 ms 1872 KB Output is correct
38 Correct 15 ms 2128 KB Output is correct
39 Correct 36 ms 2012 KB Output is correct
40 Correct 35 ms 2028 KB Output is correct
41 Correct 70 ms 2280 KB Output is correct
42 Correct 28 ms 1884 KB Output is correct
43 Correct 29 ms 2140 KB Output is correct
44 Correct 38 ms 3676 KB Output is correct
45 Correct 28 ms 3716 KB Output is correct
46 Correct 16 ms 3664 KB Output is correct
47 Correct 26 ms 3464 KB Output is correct
48 Correct 35 ms 2032 KB Output is correct
49 Correct 66 ms 2384 KB Output is correct
50 Correct 29 ms 1872 KB Output is correct
51 Correct 20 ms 2264 KB Output is correct
52 Correct 39 ms 2024 KB Output is correct
53 Correct 13 ms 2284 KB Output is correct
54 Correct 72 ms 2140 KB Output is correct
55 Correct 20 ms 2008 KB Output is correct
56 Correct 76 ms 3448 KB Output is correct
57 Correct 27 ms 2128 KB Output is correct
58 Correct 22 ms 2128 KB Output is correct
59 Correct 50 ms 2028 KB Output is correct
60 Correct 39 ms 1872 KB Output is correct
61 Correct 15 ms 2028 KB Output is correct
62 Correct 16 ms 1884 KB Output is correct
63 Correct 15 ms 2128 KB Output is correct
64 Correct 15 ms 2044 KB Output is correct
65 Correct 17 ms 1872 KB Output is correct
66 Correct 18 ms 2284 KB Output is correct
67 Correct 22 ms 3712 KB Output is correct
68 Correct 13 ms 3408 KB Output is correct
69 Correct 22 ms 3464 KB Output is correct
70 Correct 20 ms 2128 KB Output is correct
71 Partially correct 94 ms 2008 KB Partially correct - number of queries: 5024
72 Correct 23 ms 1872 KB Output is correct
73 Partially correct 76 ms 2128 KB Partially correct - number of queries: 5042
74 Correct 85 ms 1872 KB Output is correct
75 Correct 19 ms 2004 KB Output is correct
76 Correct 75 ms 2276 KB Output is correct
77 Correct 76 ms 3444 KB Output is correct
78 Correct 21 ms 2008 KB Output is correct
79 Correct 47 ms 2024 KB Output is correct
80 Correct 68 ms 2128 KB Output is correct
81 Correct 64 ms 2128 KB Output is correct
82 Correct 56 ms 2016 KB Output is correct
83 Correct 21 ms 2128 KB Output is correct
84 Correct 62 ms 2304 KB Output is correct
85 Correct 79 ms 1872 KB Output is correct
86 Correct 35 ms 2036 KB Output is correct
87 Correct 18 ms 3664 KB Output is correct
88 Correct 33 ms 3464 KB Output is correct
89 Correct 44 ms 2024 KB Output is correct
90 Correct 17 ms 2036 KB Output is correct
91 Correct 17 ms 2048 KB Output is correct
92 Correct 32 ms 2028 KB Output is correct
93 Incorrect 153 ms 1884 KB Incorrect
94 Halted 0 ms 0 KB -