oj.uz

답안 #899631

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
899631 2024-01-06T15:25:12 Z Szil 가장 긴 여행 (IOI23_longesttrip) C++17
70 / 100
 23 ms 976 KB 
#include <bits/stdc++.h>
#include "longesttrip.h"

using namespace std;

vector<int> solve3(int N) {
    vector<int> ans(N);
    iota(ans.begin(), ans.end(), 0);
    return ans;
}

vector<int> solve2(int N) {
    queue<int> q;
    vector<int> ans;
    for (int i = 0; i < N; i++) {
        q.push(i);
    }
    int extra = -1;
    while (!q.empty()) {
        int u = q.front();
        q.pop();
        ans.emplace_back(u);
        if (q.empty()) continue;

        int v = q.front();
        if (!are_connected({u}, {v})) {
            q.pop();
            if (q.empty()) {
                extra = v;
            } else {
                q.push(v);
            }
        }
    }
    vector<int> res;
    for (int i = 0; i < ans.size(); i++) {
        if (i == 0 && extra != -1) res.emplace_back(extra);
        res.emplace_back(ans[i]);
    }
    for (int i = 1; i < res.size(); i++) {
        assert(are_connected({res[i-1]}, {res[i]}));
    }
    assert(res.size() == N);
    return res;
}

vector<int> merge_vectors(const vector<int> &a, const vector<int> &b) {
    vector<int> res;
    for (int i : a) res.emplace_back(i);
    for (int i : b) res.emplace_back(i);
    return res;
}

vector<int> get_interval(const vector<int> &a, int l, int r) {
    vector<int> res;
    for (int i = l; i <= r; i++) {
        res.emplace_back(a[i]);
    }
    return res;
}

int find_connection(const vector<int> &a, const vector<int> &b) {
    int lo = 0, hi = a.size() - 1;
    while (lo < hi) {
        int mid = (lo + hi) / 2;
        if (are_connected(get_interval(a, lo, mid), b)) {
            hi = mid;
        } else {
            lo = mid + 1;
        }
    }
    return lo;
}

vector<int> add_to_component(vector<int> comp, int u) {
    if (comp.empty()) return {u};
    if (comp.size() == 1) return {comp.front(), u};

    // TODO remove this and only check with binary search
    if (are_connected({comp.front()}, {u})) {
        return merge_vectors({u}, comp);
    }

    // TODO remove this and only check with binary search
    if (are_connected({comp.back()}, {u})) {
        return merge_vectors(comp, {u});
    }

    int idx = find_connection(comp, {u});

    vector<int> res1 = {u, comp[idx]};
    auto res2 = merge_vectors(res1, get_interval(comp, idx+1, comp.size()-1));
    auto res3 = merge_vectors(res2, get_interval(comp, 0, idx-1));

    return res3;
}

vector<int> solve1(int N) {
    vector<int> a = {0}, b;

    for (int i = 1; i < N; i++) {
        if (are_connected(a, {i})) {
            a = add_to_component(a, i);
        } else {
            b = add_to_component(b, i);
        }
    }
    if (b.size() > 0 && are_connected(a, b)) {
        if (are_connected({a.front()}, {b.front()})) {
            reverse(a.begin(), a.end());
            return merge_vectors(a, b);
        }
        if (are_connected({a.back()}, {b.front()})) {
            return merge_vectors(a, b);
        }
        if (are_connected({a.front()}, {b.back()})) {
            reverse(a.begin(), a.end());
            reverse(b.begin(), b.end());
            return merge_vectors(a, b);
        }
        if (are_connected({a.back()}, {b.back()})) {
            reverse(b.begin(), b.end());
            return merge_vectors(a, b);
        }

        int idx_in_a = find_connection(a, b);
        int idx_in_b = find_connection(b, a);

        auto res1 = get_interval(a, idx_in_a+1, a.size()-1);
        auto res2 = merge_vectors(res1, get_interval(a, 0, idx_in_a));
        auto res3 = merge_vectors(res2, get_interval(b, idx_in_b, b.size()-1));
        auto res4 = merge_vectors(res3, get_interval(b, 0, idx_in_b-1));

        return res4;
    } else {
        if (a.size() > b.size()) return a;
        else return b;
    }
}

vector<int> longest_trip(int N, int D)
{
    
    if (D == 3) return solve3(N);
    if (D == 2) return solve2(N);
    if (D == 1) return solve1(N);
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> solve2(int)':
longesttrip.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for (int i = 0; i < ans.size(); i++) {
      |                     ~~^~~~~~~~~~~~
longesttrip.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i = 1; i < res.size(); i++) {
      |                     ~~^~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from longesttrip.cpp:1:
longesttrip.cpp:43:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |     assert(res.size() == N);
      |            ~~~~~~~~~~~^~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:147:1: warning: control reaches end of non-void function [-Wreturn-type]
  147 | }
      | ^

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 5 ms 464 KB Output is correct

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 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 1 ms 352 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 11 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 9 ms 344 KB Output is correct
5 Correct 12 ms 600 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 9 ms 344 KB Output is correct
8 Correct 8 ms 344 KB Output is correct
9 Correct 8 ms 344 KB Output is correct
10 Correct 9 ms 344 KB Output is correct
11 Correct 9 ms 600 KB Output is correct
12 Correct 8 ms 344 KB Output is correct
13 Correct 8 ms 344 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 9 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 16 ms 696 KB Output is correct
5 Correct 20 ms 704 KB Output is correct
6 Correct 8 ms 596 KB Output is correct
7 Correct 9 ms 344 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 12 ms 436 KB Output is correct
10 Correct 19 ms 716 KB Output is correct
11 Correct 17 ms 464 KB Output is correct
12 Correct 18 ms 724 KB Output is correct
13 Correct 18 ms 464 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 9 ms 344 KB Output is correct
16 Correct 14 ms 344 KB Output is correct
17 Correct 12 ms 596 KB Output is correct
18 Correct 12 ms 344 KB Output is correct
19 Correct 15 ms 600 KB Output is correct
20 Correct 13 ms 436 KB Output is correct
21 Correct 19 ms 704 KB Output is correct
22 Correct 19 ms 720 KB Output is correct
23 Correct 19 ms 716 KB Output is correct
24 Correct 19 ms 724 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 6 ms 344 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 10 ms 344 KB Output is correct
29 Correct 8 ms 344 KB Output is correct
30 Correct 10 ms 436 KB Output is correct
31 Correct 10 ms 432 KB Output is correct
32 Correct 11 ms 344 KB Output is correct
33 Correct 11 ms 436 KB Output is correct
34 Correct 12 ms 440 KB Output is correct
35 Correct 12 ms 604 KB Output is correct
36 Correct 19 ms 468 KB Output is correct
37 Correct 17 ms 720 KB Output is correct
38 Correct 19 ms 952 KB Output is correct
39 Correct 16 ms 616 KB Output is correct
40 Correct 13 ms 700 KB Output is correct
41 Correct 13 ms 444 KB Output is correct
42 Correct 15 ms 948 KB Output is correct
43 Correct 14 ms 436 KB Output is correct
44 Correct 14 ms 696 KB Output is correct
45 Correct 11 ms 340 KB Output is correct
46 Correct 10 ms 344 KB Output is correct
47 Correct 10 ms 344 KB Output is correct
48 Correct 12 ms 344 KB Output is correct
49 Correct 11 ms 344 KB Output is correct
50 Correct 15 ms 436 KB Output is correct
51 Correct 11 ms 436 KB Output is correct
52 Correct 12 ms 436 KB Output is correct
53 Correct 14 ms 436 KB Output is correct
54 Correct 13 ms 604 KB Output is correct
55 Correct 13 ms 440 KB Output is correct
56 Correct 18 ms 636 KB Output is correct
57 Correct 18 ms 708 KB Output is correct
58 Correct 18 ms 704 KB Output is correct
59 Correct 19 ms 452 KB Output is correct
60 Correct 14 ms 452 KB Output is correct
61 Correct 17 ms 708 KB Output is correct
62 Correct 16 ms 700 KB Output is correct
63 Correct 15 ms 608 KB Output is correct
64 Correct 17 ms 704 KB Output is correct

Subtask #4
30.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 14 ms 604 KB Output is correct
5 Partially correct 19 ms 600 KB Output is partially correct
6 Correct 11 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 12 ms 344 KB Output is correct
9 Correct 14 ms 600 KB Output is correct
10 Partially correct 19 ms 724 KB Output is partially correct
11 Partially correct 20 ms 608 KB Output is partially correct
12 Partially correct 17 ms 720 KB Output is partially correct
13 Partially correct 18 ms 464 KB Output is partially correct
14 Correct 6 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Correct 12 ms 344 KB Output is correct
17 Correct 12 ms 596 KB Output is correct
18 Correct 12 ms 344 KB Output is correct
19 Correct 13 ms 340 KB Output is correct
20 Correct 13 ms 436 KB Output is correct
21 Correct 8 ms 344 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 9 ms 344 KB Output is correct
24 Correct 8 ms 344 KB Output is correct
25 Correct 8 ms 596 KB Output is correct
26 Correct 11 ms 684 KB Output is correct
27 Correct 10 ms 436 KB Output is correct
28 Correct 9 ms 344 KB Output is correct
29 Correct 13 ms 440 KB Output is correct
30 Correct 12 ms 436 KB Output is correct
31 Correct 12 ms 444 KB Output is correct
32 Correct 9 ms 344 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 11 ms 344 KB Output is correct
35 Correct 12 ms 344 KB Output is correct
36 Correct 13 ms 344 KB Output is correct
37 Correct 12 ms 440 KB Output is correct
38 Correct 10 ms 432 KB Output is correct
39 Correct 12 ms 432 KB Output is correct
40 Correct 15 ms 436 KB Output is correct
41 Correct 14 ms 436 KB Output is correct
42 Correct 13 ms 440 KB Output is correct
43 Partially correct 21 ms 464 KB Output is partially correct
44 Partially correct 18 ms 472 KB Output is partially correct
45 Partially correct 19 ms 468 KB Output is partially correct
46 Partially correct 20 ms 724 KB Output is partially correct
47 Partially correct 23 ms 716 KB Output is partially correct
48 Partially correct 20 ms 600 KB Output is partially correct
49 Partially correct 19 ms 968 KB Output is partially correct
50 Partially correct 15 ms 452 KB Output is partially correct
51 Partially correct 15 ms 452 KB Output is partially correct
52 Partially correct 17 ms 948 KB Output is partially correct
53 Partially correct 13 ms 688 KB Output is partially correct
54 Partially correct 13 ms 700 KB Output is partially correct
55 Partially correct 13 ms 604 KB Output is partially correct
56 Partially correct 17 ms 472 KB Output is partially correct
57 Partially correct 17 ms 712 KB Output is partially correct
58 Partially correct 15 ms 868 KB Output is partially correct
59 Partially correct 12 ms 452 KB Output is partially correct
60 Partially correct 13 ms 440 KB Output is partially correct
61 Partially correct 13 ms 860 KB Output is partially correct
62 Partially correct 19 ms 472 KB Output is partially correct
63 Partially correct 18 ms 968 KB Output is partially correct
64 Partially correct 15 ms 968 KB Output is partially correct
65 Partially correct 15 ms 680 KB Output is partially correct
66 Partially correct 15 ms 456 KB Output is partially correct
67 Partially correct 16 ms 456 KB Output is partially correct
68 Partially correct 14 ms 704 KB Output is partially correct
69 Partially correct 14 ms 452 KB Output is partially correct
70 Partially correct 16 ms 456 KB Output is partially correct
71 Partially correct 19 ms 972 KB Output is partially correct
72 Partially correct 18 ms 712 KB Output is partially correct
73 Partially correct 15 ms 468 KB Output is partially correct
74 Partially correct 15 ms 452 KB Output is partially correct
75 Partially correct 16 ms 716 KB Output is partially correct
76 Partially correct 16 ms 612 KB Output is partially correct
77 Partially correct 19 ms 720 KB Output is partially correct
78 Partially correct 18 ms 876 KB Output is partially correct
79 Partially correct 16 ms 716 KB Output is partially correct
80 Partially correct 16 ms 976 KB Output is partially correct
81 Partially correct 16 ms 948 KB Output is partially correct
82 Partially correct 14 ms 700 KB Output is partially correct