oj.uz

답안 #899617

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
899617 2024-01-06T14:51:25 Z Szil 가장 긴 여행 (IOI23_longesttrip) C++17
15 / 100
 62 ms 956 KB 
#include <bits/stdc++.h>
#include "longesttrip.h"

using namespace std;

// bool are_connected(int[] A, int[] B);

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;
}

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

    int lo = 1, hi = comp.size() - 1;
    while (lo < hi) {
        int mid = (lo + hi) / 2;
        if (are_connected(get_interval(comp, lo, mid), {u})) {
            hi = mid;
        } else {
            lo = mid + 1;
        }
    }

    vector<int> res1 = {u, comp[lo]};
    auto res2 = merge_vectors(res1, get_interval(comp, lo+1, comp.size()-1));
    auto res3 = merge_vectors(res2, get_interval(comp, 0, lo-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 (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:38:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for (int i = 0; i < ans.size(); i++) {
      |                     ~~^~~~~~~~~~~~
longesttrip.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     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:45:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   45 |     assert(res.size() == N);
      |            ~~~~~~~~~~~^~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:104:1: warning: control reaches end of non-void function [-Wreturn-type]
  104 | }
      | ^

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

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 340 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

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

Subtask #3
0.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 15 ms 344 KB Output is correct
3 Correct 36 ms 344 KB Output is correct
4 Correct 41 ms 604 KB Output is correct
5 Correct 62 ms 956 KB Output is correct
6 Incorrect 0 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 17 ms 344 KB Output is correct
3 Correct 26 ms 344 KB Output is correct
4 Partially correct 46 ms 692 KB Output is partially correct
5 Partially correct 62 ms 460 KB Output is partially correct
6 Incorrect 0 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -