oj.uz

Submission #918941

# Submission time Handle Problem Language Result Execution time Memory
918941 2024-01-30T21:40:49 Z vjudge1 Chameleon's Love (JOI20_chameleon) C++17
100 / 100
 38 ms 756 KB 
#include "chameleon.h"

#include <bits/stdc++.h>
using namespace std;
namespace std {

template <class Fun>
class y_combinator_result {
        Fun fun_;

       public:
        template <class T>
        explicit y_combinator_result(T &&fun) : fun_(std::forward<T>(fun)) {}

        template <class... Args>
        decltype(auto) operator()(Args &&...args) {
                return fun_(std::ref(*this), std::forward<Args>(args)...);
        }
};

template <class Fun>
decltype(auto) y_combinator(Fun &&fun) {
        return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun));
}

/* Example
        auto fun = y_combinator([&](auto self, int x) -> void {
                self(x + 1);
        });
*/

}  // namespace std
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void Solve(int N) {
        auto ask = [&](vector<int> p) {
                for (auto &x : p) x++;
                return Query(p);
        };

        vector<vector<int>> one_match(N * 2);

        for (int i = 0; i < N * 2; i++) {
                vector<int> vis(i, -1);
                auto dfs = y_combinator([&](auto dfs, int u, int _) -> void {
                        vis[u] = _;
                        for (int v : one_match[u]) {
                                if (vis[v] == -1) dfs(v, _ ^ 1);
                        }
                });
                for (int j = 0; j < i; j++) {
                        if (vis[j] == -1) dfs(j, 0);
                }
                for (int z = 0; z < 2; z++) {
                        vector<int> a;
                        for (int j = 0; j < i; j++) {
                                if (vis[j] == z) a.emplace_back(j);
                        }
                        while (true) {
                                a.emplace_back(i);
                                if (ask(a) == a.size()) break;
                                a.pop_back();
                                vector<int> rem(a.size());
                                iota(rem.begin(), rem.end(), 1);
                                for (int j = 1; j <= a.size(); j <<= 1) {
                                        vector<int> what(1, i);
                                        for (int k : rem) {
                                                if (k & j) what.emplace_back(a[k - 1]);
                                        }
                                        int ok = what.size() == 1 ? 0 : (ask(what) != what.size());
                                        vector<int> tmp;
                                        for (int k : rem) {
                                                if (((k & j) > 0) == ok) tmp.emplace_back(k);
                                        }
                                        swap(rem, tmp);
                                }
                                if (rem.size() == 0) break;
                                assert(rem.size() == 1);
                                int x = rem[0];
                                x--;
                                one_match[i].emplace_back(a[x]);
                                one_match[a[x]].emplace_back(i);
                                a.erase(a.begin() + x);
                        }
                }
        }

        vector<int> answer(2 * N);
        vector<int> love(2 * N);
        vector<int> evol(2 * N);
        vector<int> done(N * 2, 0);
        for (int i = 0; i < 2 * N; i++) {
                if (one_match[i].size() == 1) {
                        if (answer[i]) continue;
                        answer[i] = 1;
                        answer[one_match[i][0]] = 1;
                        Answer(i + 1, one_match[i][0] + 1);
                } else {
                        int last = -1;
                        while (done[i] == 0) {
                                done[i] = 1;
                                int a = one_match[i][0];
                                int b = one_match[i][1];
                                int c = one_match[i][2];
                                if (last == -1) {
                                        if (ask({i, a, b}) == 1) {
                                                love[i] = c;
                                                evol[c] = i;
                                        } else if (ask({i, a, c}) == 1) {
                                                love[i] = b;
                                                evol[b] = i;
                                        } else {
                                                love[i] = a;
                                                evol[a] = i;
                                        }
                                } else {
                                        if (last != a && ask({i, last, a}) == 1) {
                                                int nxt = last ^ b ^ c;
                                                love[i] = nxt;
                                                evol[nxt] = i;
                                                last = i;
                                                i = nxt;
                                        } else if (last != b && ask({i, last, b}) == 1) {
                                                int nxt = last ^ a ^ c;
                                                love[i] = nxt;
                                                evol[nxt] = i;
                                                last = i;
                                                i = nxt;
                                        } else {
                                                int nxt = last ^ a ^ b;
                                                love[i] = nxt;
                                                evol[nxt] = i;
                                                last = i;
                                                i = nxt;
                                        }
                                }
                        }
                }
        }
        for (int i = 0; i < 2 * N; i++) {
                if (answer[i]) continue;
                for (int j : one_match[i]) {
                        if (j == love[i]) continue;
                        if (j == evol[i]) continue;
                        answer[i] = answer[j] = 1;
                        Answer(i + 1, j + 1);
                }
        }
}

Compilation message

chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:61:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |                                 if (ask(a) == a.size()) break;
      |                                     ~~~~~~~^~~~~~~~~~~
chameleon.cpp:65:51: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |                                 for (int j = 1; j <= a.size(); j <<= 1) {
      |                                                 ~~^~~~~~~~~~~
chameleon.cpp:70:84: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |                                         int ok = what.size() == 1 ? 0 : (ask(what) != what.size());
      |                                                                          ~~~~~~~~~~^~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 16 ms 540 KB Output is correct
4 Correct 17 ms 344 KB Output is correct
5 Correct 18 ms 344 KB Output is correct
6 Correct 16 ms 344 KB Output is correct
7 Correct 16 ms 540 KB Output is correct
8 Correct 17 ms 544 KB Output is correct
9 Correct 16 ms 600 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 596 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 596 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 756 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 34 ms 568 KB Output is correct
4 Correct 35 ms 344 KB Output is correct
5 Correct 38 ms 344 KB Output is correct
6 Correct 36 ms 600 KB Output is correct
7 Correct 35 ms 584 KB Output is correct
8 Correct 35 ms 592 KB Output is correct
9 Correct 34 ms 344 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 16 ms 540 KB Output is correct
4 Correct 17 ms 344 KB Output is correct
5 Correct 18 ms 344 KB Output is correct
6 Correct 16 ms 344 KB Output is correct
7 Correct 16 ms 540 KB Output is correct
8 Correct 17 ms 544 KB Output is correct
9 Correct 16 ms 600 KB Output is correct
10 Correct 0 ms 596 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 1 ms 756 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 34 ms 568 KB Output is correct
31 Correct 35 ms 344 KB Output is correct
32 Correct 38 ms 344 KB Output is correct
33 Correct 36 ms 600 KB Output is correct
34 Correct 35 ms 584 KB Output is correct
35 Correct 35 ms 592 KB Output is correct
36 Correct 34 ms 344 KB Output is correct
37 Correct 37 ms 344 KB Output is correct
38 Correct 17 ms 344 KB Output is correct
39 Correct 37 ms 600 KB Output is correct
40 Correct 38 ms 344 KB Output is correct
41 Correct 37 ms 540 KB Output is correct
42 Correct 16 ms 344 KB Output is correct
43 Correct 34 ms 344 KB Output is correct
44 Correct 37 ms 344 KB Output is correct
45 Correct 38 ms 556 KB Output is correct