Submission #623772

#	Time	Username	Problem	Language	Result	Execution time	Memory
623772		Vladth11	Roads (CEOI20_roads)	C++14	15 / 100	104 ms	6576 KiB

roads

#include <bits/stdc++.h>
#define C 1
#define P 0
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
 
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;
 
const ll NMAX = 100001;
const ll VMAX = 101;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 447;
const ll base = 117;
const ll nr_of_bits = 18;
const ll inv2 = 500000004;
 
map <pii, pii> mp;
pii v[NMAX * 2];
 
struct ura{
    pii a, b;
};
 
vector <ura> sol;
map <pii, bool> scutit;
double slope = 1;
 
bool mic(pii a, pii b){
    pair <double, double> pa = {a.first * cos(slope), a.second * sin(slope)};
    pair <double, double> pb = {b.first * cos(slope), b.second * sin(slope)};
    return pa < pb;
}
 
bool cmp(pii a, pii b){
    return (mic(a, b));
}
 
int main() {
    //ifstream cin(".in");
    //ofstream cout(".out");
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, i;
    cin >> n;
    for(i = 1; i <= n; i++){
        pii a, b;
        cin >> a.first >> a.second >> b.first >> b.second;
        if(a.first != b.first)
            slope = (double)((double)a.second - (double)b.second) / (double)((double)a.first - (double)b.first);
        mp[a] = b;
        mp[b] = a;
        if(mic(a, b))
            swap(a, b);
        v[i] = a;
    }
    sort(v + 1, v + n + 1, cmp);
    for(i = 1; i < n; i++){
        sol.push_back({v[i], mp[v[i + 1]]});
    }
    for(auto x : sol){
        cout << x.a.first << " " << x.a.second << " " << x.b.first << " " << x.b.second << "\n";
    }
    return 0;
}

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