Submission #413528

#	Time	Username	Problem	Language	Result	Execution time	Memory
413528		Pbezz	Roads (CEOI20_roads)	C++14	30 / 100	140 ms	9372 KiB

roads

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define ll long long
#define pb push_back
#define mp make_pair
typedef pair<ll,ll> pii;
 
typedef tree<pii ,null_type, less<pii>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
 
const ll MAXN = 301;
const ll MOD = 1e9+7;
const ll INF = 1e6+10;

long double value(pair<pii, pii> v){

long double x1,x2,y1,y2;
x1 = (long double)v.first.first;
y1 = (long double)v.first.second;
x2 = (long double)v.second.first;
y2 = (long double)v.second.second;

y2-=y1;
x2-=x1;

x1 = (long double)((x1*y2)/x2);

return (long double)(y1-x1);
}

bool comp( pair<pii, pii> v,  pair<pii, pii>b){
//return true if v is smaller than b
long double x1,x2,y1,y2,x3,y3;
x1 = (long double)v.first.first;
y1 = (long double)v.first.second;
x2 = (long double)v.second.first;
y2 = (long double)v.second.second;

x3 = (long double)b.second.first;
y3 = (long double)b.second.second;

long double res = (y1*x3+y2*x1+y3*x2-y3*x1-y1*x2-y2*x3)/2;

if(res==0)return x1<x3;

return res>0;


}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	ll n,i,x1,x2,y1,y2;
	cin>>n;

	vector< pair<pii, pii> >v(n);
	for(i=0;i<n;i++){

	cin>>x1>>y1>>x2>>y2;
	if(y2<y1){
swap(y2,y1);
swap(x2,x1);
	}
	v[i]={ {x1,y1}, {x2,y2} };
	}//x1=x2 e y2>y1

	if(x1==x2){//todos verticais
	sort(v.begin(),v.end());

	}else{

	for(i=0;i<n;i++){//ver qual a y coordinate em x=0
	if(v[i].first.first>v[i].second.first)swap(v[i].first,v[i].second);
	}

	//sort(info.begin(),info.end());
	sort(v.begin(),v.end(),comp);

}

	for(i=0;i<n-1;i++){

	cout<<v[i].second.first<<" "<<v[i].second.second<<" ";
	cout<<v[i+1].first.first<<" "<<v[i+1].first.second<<'\n';

}




return 0;
}

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