oj.uz

Submission #1080659

# Submission time Handle Problem Language Result Execution time Memory
1080659 2024-08-29T11:59:34 Z shmax Longest Trip (IOI23_longesttrip) C++17
15 / 100
 720 ms 848 KB 
#include "longesttrip.h"
#include "bits/stdc++.h"

using namespace std;
#define len(x) (int)(x.size())
#define all(x) x.begin(), x.end()
#define inf 1000'000'000'000'000'000LL
#define bit(x, i) (((x) >> i) & 1)


template<typename T>
using vec = vector<T>;

std::vector<int> longest_trip(int n, int d) {
    mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
    if (d == 3) {
        vec<int> ans(n);
        iota(all(ans), 0);
        return ans;
    }
    if (d == 2) {
        deque<int> ans;
        int cur = 0;
        ans.push_back(cur);
        set<int> not_used;
        for (int i = 1; i < n; i++) {
            not_used.insert(i);
        }
        while (true) {
            if (not_used.empty()) break;
            vec<int> next(all(not_used));
            int nxt = next[0];
            if (are_connected({cur}, {nxt})) {
                ans.push_back(nxt);
                not_used.erase(nxt);
                cur = nxt;
            } else {
                if (next.size() == 1) {
                    ans.push_front(next[0]);
                    break;
                } else {
                    int net = next[1];
                    ans.push_back(net);
                    not_used.erase(net);
                    cur = net;
                }
            }
        }
        return vec<int>(all(ans));
    } else {
        int ct = 0;
        int border = n * 1300;
        auto attempt = [&]() {
            deque<int> ans;
            int cur = rnd() % n;
            ans.push_back(cur);
            set<int> not_used;
            for (int i = 0; i < n; i++) {
                if (i != cur) not_used.insert(i);
            }
            auto try_find = [&](int v) {
                vec<int> t(all(not_used));
                ct += len(t) + 1;
                if (!are_connected({v}, t)) return -1;
                shuffle(all(t), rnd);
                int tl = 0;
                int tr = len(t) - 1;
                auto get_part = [&](int f) {
                    vec<int> r;
                    for (int i = 0; i <= f; i++)
                        r.push_back(t[i]);
                    return r;
                };
                while (tl != tr) {
                    int tm = (tl + tr) / 2;
                    ct += len(get_part(tm)) + 1;
                    if (are_connected({v}, get_part(tm))) {
                        tr = tm;
                    } else {
                        tl = tm + 1;
                    }
                }
                return t[tl];
            };

            while (true) {
                if (not_used.empty()) break;
                int u = try_find(ans.back());
                if (u == -1) break;
                ans.push_back(u);
                not_used.erase(u);
            }
            while (true) {
                if (not_used.empty()) break;
                int u = try_find(ans.front());
                if (u == -1) break;
                ans.push_front(u);
                not_used.erase(u);
            }
            return vec<int>(all(ans));
        };
        int T = 15;
        vec<int> best;
        while (T--) {
            if (ct > border) break;
            auto g = attempt();
            if (len(g) > len(best))
                best = g;
            if (len(best) == n) break;
        }
        return best;
    }
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 15 ms 508 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 7 ms 344 KB Output is correct
4 Correct 8 ms 344 KB Output is correct
5 Correct 7 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Correct 6 ms 344 KB Output is correct
10 Correct 6 ms 344 KB Output is correct
11 Correct 6 ms 344 KB Output is correct
12 Correct 6 ms 484 KB Output is correct
13 Correct 6 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 15 ms 344 KB Output is correct
3 Correct 38 ms 344 KB Output is correct
4 Correct 62 ms 344 KB Output is correct
5 Correct 63 ms 600 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 18 ms 344 KB Output is correct
8 Correct 38 ms 420 KB Output is correct
9 Correct 42 ms 344 KB Output is correct
10 Correct 76 ms 600 KB Output is correct
11 Correct 64 ms 600 KB Output is correct
12 Correct 61 ms 492 KB Output is correct
13 Correct 68 ms 596 KB Output is correct
14 Correct 107 ms 344 KB Output is correct
15 Correct 123 ms 344 KB Output is correct
16 Correct 20 ms 344 KB Output is correct
17 Correct 44 ms 344 KB Output is correct
18 Correct 33 ms 344 KB Output is correct
19 Correct 40 ms 344 KB Output is correct
20 Correct 46 ms 344 KB Output is correct
21 Correct 66 ms 344 KB Output is correct
22 Correct 69 ms 344 KB Output is correct
23 Correct 71 ms 344 KB Output is correct
24 Correct 71 ms 348 KB Output is correct
25 Correct 145 ms 344 KB Output is correct
26 Correct 126 ms 344 KB Output is correct
27 Correct 292 ms 344 KB Output is correct
28 Correct 297 ms 344 KB Output is correct
29 Correct 322 ms 344 KB Output is correct
30 Correct 695 ms 344 KB Output is correct
31 Correct 483 ms 344 KB Output is correct
32 Correct 413 ms 344 KB Output is correct
33 Correct 694 ms 600 KB Output is correct
34 Correct 684 ms 344 KB Output is correct
35 Correct 654 ms 600 KB Output is correct
36 Correct 345 ms 492 KB Output is correct
37 Correct 342 ms 600 KB Output is correct
38 Incorrect 353 ms 848 KB too many elements
39 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 17 ms 344 KB Output is correct
3 Correct 36 ms 344 KB Output is correct
4 Partially correct 63 ms 344 KB Output is partially correct
5 Partially correct 74 ms 488 KB Output is partially correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 22 ms 344 KB Output is correct
8 Correct 44 ms 416 KB Output is correct
9 Partially correct 56 ms 344 KB Output is partially correct
10 Partially correct 72 ms 600 KB Output is partially correct
11 Partially correct 72 ms 592 KB Output is partially correct
12 Partially correct 67 ms 344 KB Output is partially correct
13 Partially correct 72 ms 600 KB Output is partially correct
14 Correct 125 ms 344 KB Output is correct
15 Correct 106 ms 344 KB Output is correct
16 Correct 27 ms 344 KB Output is correct
17 Correct 32 ms 344 KB Output is correct
18 Partially correct 43 ms 344 KB Output is partially correct
19 Partially correct 48 ms 344 KB Output is partially correct
20 Partially correct 43 ms 344 KB Output is partially correct
21 Correct 130 ms 344 KB Output is correct
22 Correct 105 ms 344 KB Output is correct
23 Partially correct 309 ms 344 KB Output is partially correct
24 Partially correct 279 ms 344 KB Output is partially correct
25 Partially correct 287 ms 344 KB Output is partially correct
26 Partially correct 646 ms 344 KB Output is partially correct
27 Partially correct 476 ms 344 KB Output is partially correct
28 Partially correct 389 ms 344 KB Output is partially correct
29 Partially correct 720 ms 344 KB Output is partially correct
30 Partially correct 664 ms 344 KB Output is partially correct
31 Partially correct 636 ms 344 KB Output is partially correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 12 ms 344 KB Output is correct
34 Correct 47 ms 344 KB Output is correct
35 Correct 26 ms 344 KB Output is correct
36 Correct 35 ms 344 KB Output is correct
37 Incorrect 97 ms 344 KB Incorrect
38 Halted 0 ms 0 KB -