Submission #573430

#	Time	Username	Problem	Language	Result	Execution time	Memory
573430		piOOE	Roads (CEOI20_roads)	C++17	15 / 100	25 ms	4328 KiB

roads

#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;

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 = 200000, infI = 1e9 + 7;

int X[N], Y[N];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<pair<int, int>> yy;
    map<int, vector<pair<int, int>>> mp;
    for (int i = 0; i < n; ++i) {
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        X[i << 1] = x1, Y[i << 1] = y1;
        X[i << 1 | 1] = x2, Y[i << 1 | 1] = y2;
        yy.emplace_back(x1, y1);
        yy.emplace_back(x2, y2);
        mp[x1].emplace_back(min(y1, y2), max(y1, y2));
    }
    sort(all(yy));
    auto get_idx = [&yy](int x, int y) {
        int it = lower_bound(all(yy), make_pair(x, y)) - begin(yy);
        if (it == sz(yy) || yy[it] != make_pair(x, y)) {
            return -1;
        }
        return it;
    };
    pair<int, int> lst = {-infI, -infI};
    for (auto [x, a]: mp) {
        sort(all(a));
        if (lst.first != -infI) {
            cout << lst.first << " " << lst.second << " " << x << " " << a[0].first << '\n';
        }
        lst = {x, a[0].first};
        for (int i = 0; i < sz(a) - 1; ++i) {
            cout << x << " " << a[i].second << " " << x << " " << a[i + 1].first << '\n';
        }
    }
    return 0;
}

Compilation message (stderr)

roads.cpp: In function 'int main()':
roads.cpp:36:10: warning: variable 'get_idx' set but not used [-Wunused-but-set-variable]
   36 |     auto get_idx = [&yy](int x, int y) {
      |          ^~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 15 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 40