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답안 #575923

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
575923 2022-06-11T18:02:22 Z piOOE Roads (CEOI20_roads) C++17
100 / 100
 142 ms 9784 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);

signed 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 46 ms 3780 KB Output is correct

Subtask #2
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 10 ms 2040 KB Output is correct
5 Correct 19 ms 2760 KB Output is correct

Subtask #3
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 10 ms 2004 KB Output is correct
5 Correct 19 ms 2796 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 11 ms 2004 KB Output is correct
10 Correct 142 ms 8876 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 10 ms 2004 KB Output is correct
5 Correct 19 ms 2768 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 10 ms 1968 KB Output is correct
10 Correct 47 ms 5056 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 1108 KB Output is correct
5 Correct 10 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 1108 KB Output is correct
9 Correct 12 ms 1928 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 10 ms 2004 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 2 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 1716 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 51 ms 3784 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 10 ms 2004 KB Output is correct
7 Correct 20 ms 2768 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 12 ms 2004 KB Output is correct
12 Correct 137 ms 8888 KB Output is correct
13 Correct 1 ms 1108 KB Output is correct
14 Correct 2 ms 1108 KB Output is correct
15 Correct 2 ms 1108 KB Output is correct
16 Correct 11 ms 2004 KB Output is correct
17 Correct 48 ms 4964 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 1 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 1472 KB Output is correct
27 Correct 5 ms 1492 KB Output is correct
28 Correct 10 ms 1720 KB Output is correct
29 Correct 70 ms 6332 KB Output is correct
30 Correct 99 ms 8544 KB Output is correct
31 Correct 1 ms 1108 KB Output is correct
32 Correct 101 ms 6300 KB Output is correct
33 Correct 89 ms 6304 KB Output is correct
34 Correct 116 ms 7956 KB Output is correct
35 Correct 122 ms 8292 KB Output is correct
36 Correct 126 ms 9784 KB Output is correct