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답안 #575924

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
575924 2022-06-11T18:04:21 Z piOOE Roads (CEOI20_roads) C++17
100 / 100
 153 ms 9752 KB 
#include <bits/stdc++.h>

using namespace std;

#define sz(x) ((int)size(x))
#define all(x) begin(x), end(x)
#define trace(x) cout << #x << ": " << (x) << endl;

typedef long long ll;
typedef double db;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int rand(int l, int r) { return (int) ((ll) rnd() % (r - l + 1)) + l; }

const int N = 100002, infI = 1e9 + 7;

int X[N][2], Y[N][2];

pair<int, int> R[N];
int x_now = -infI;

db get(int i) {
    if (x_now == X[i][0]) {
        return Y[i][0];
    }
    db k = (Y[i][0] - Y[i][1]) / (db) (X[i][0] - X[i][1]);
    db b = Y[i][0] - X[i][0] * k;
    return k * x_now + b;
}

auto comp = [](int i, int j) {
    return get(i) < get(j);
};

set<int, decltype(comp)> st(comp);

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<tuple<int, int, int, int>> qu;
    for (int i = 0; i < n; ++i) {
        cin >> X[i][0] >> Y[i][0] >> X[i][1] >> Y[i][1];
        if (X[i][0] > X[i][1] || (X[i][0] == X[i][1] && Y[i][0] > Y[i][1])) {
            swap(X[i][0], X[i][1]);
            swap(Y[i][0], Y[i][1]);
        }
        qu.emplace_back(X[i][0], Y[i][0], 0, i);
        qu.emplace_back(X[i][1], Y[i][1], 1, i);
    }
    fill(all(R), make_pair(-infI, -infI));
    sort(all(qu));
    X[n][0] = -infI, Y[n][0] = -infI;
    X[n][1] = infI, Y[n][1] = -infI;
    X[n + 1][0] = -infI, Y[n + 1][0] = infI;
    X[n + 1][1] = infI, Y[n + 1][1] = infI;
    st.insert(n);
    st.insert(n + 1);
    for (auto [x, y, tt, i]: qu) {
        x_now = x;
        if (tt == 0) {
            auto it = st.insert(i).first;
            pair<int, int> now = R[*prev(it)];
            R[*prev(it)] = R[i] = {X[i][0], Y[i][0]};
            if (now.first != -infI) {
                cout << now.first << " " << now.second << " " << X[i][0] << " " << Y[i][0] << '\n';
            }
        } else {
            auto it = st.find(i);
            R[*prev(it)] = {X[i][1], Y[i][1]};
            st.erase(i);
        }
    }
    return 0;
}

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 62 ms 3904 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1048 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 2 ms 1108 KB Output is correct
4 Correct 10 ms 1996 KB Output is correct
5 Correct 20 ms 2708 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 2 ms 1108 KB Output is correct
4 Correct 14 ms 2004 KB Output is correct
5 Correct 23 ms 2716 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 2 ms 1108 KB Output is correct
9 Correct 12 ms 2004 KB Output is correct
10 Correct 153 ms 8892 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 2 ms 1108 KB Output is correct
4 Correct 11 ms 1940 KB Output is correct
5 Correct 19 ms 2768 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 2 ms 1108 KB Output is correct
8 Correct 2 ms 1108 KB Output is correct
9 Correct 11 ms 2028 KB Output is correct
10 Correct 51 ms 5004 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 1 ms 1108 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct

Subtask #5
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 2 ms 1236 KB Output is correct
5 Correct 11 ms 2004 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 2 ms 1236 KB Output is correct
9 Correct 11 ms 2008 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 1 ms 1108 KB Output is correct
12 Correct 2 ms 1108 KB Output is correct
13 Correct 13 ms 1992 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 1 ms 1108 KB Output is correct
16 Correct 1 ms 1108 KB Output is correct
17 Correct 1 ms 1108 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 1 ms 1108 KB Output is correct
21 Correct 1 ms 1108 KB Output is correct
22 Correct 5 ms 1492 KB Output is correct
23 Correct 6 ms 1492 KB Output is correct
24 Correct 9 ms 1752 KB Output is correct
25 Correct 1 ms 1108 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 48 ms 3884 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 2 ms 1108 KB Output is correct
5 Correct 2 ms 1108 KB Output is correct
6 Correct 12 ms 2004 KB Output is correct
7 Correct 19 ms 2672 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 2 ms 1108 KB Output is correct
11 Correct 11 ms 2004 KB Output is correct
12 Correct 144 ms 8960 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 1 ms 1108 KB Output is correct
15 Correct 2 ms 1108 KB Output is correct
16 Correct 11 ms 2052 KB Output is correct
17 Correct 47 ms 4980 KB Output is correct
18 Correct 1 ms 1108 KB Output is correct
19 Correct 1 ms 1108 KB Output is correct
20 Correct 1 ms 1108 KB Output is correct
21 Correct 1 ms 1108 KB Output is correct
22 Correct 2 ms 1108 KB Output is correct
23 Correct 1 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 1 ms 1108 KB Output is correct
26 Correct 5 ms 1492 KB Output is correct
27 Correct 5 ms 1492 KB Output is correct
28 Correct 10 ms 1752 KB Output is correct
29 Correct 73 ms 6328 KB Output is correct
30 Correct 102 ms 8576 KB Output is correct
31 Correct 1 ms 1108 KB Output is correct
32 Correct 92 ms 6308 KB Output is correct
33 Correct 96 ms 6320 KB Output is correct
34 Correct 148 ms 8072 KB Output is correct
35 Correct 125 ms 8352 KB Output is correct
36 Correct 124 ms 9752 KB Output is correct