Submission #412958

#	Time	Username	Problem	Language	Result	Execution time	Memory
412958		Pbezz	Roads (CEOI20_roads)	C++14	15 / 100	108 ms	12388 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 = v.first.first;
y1 = v.first.second;
x2 = v.second.first;
y2 = v.second.second;

y2-=y1;
x2-=x1;

x1 = x1*(y2)/x2;

return y1-x1;
}

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());

	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';


}

	}else{

	long double k;
	vector< pair<long double, pii>>info(n);
	//info[i] = { Y ,{ X, I } };
	for(i=0;i<n;i++){//ver qual a y coordinate em x=0

	k = value(v[i]);
	//cout<<i<<" "<<k<<endl;
	info[i] = { k ,{ v[i].first.first, i } };
}

	sort(info.begin(),info.end());

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

	cout<<v[ info[i].second.second ].second.first<<" "<<v[info[i].second.second ].second.second<<" ";
	cout<<v[ info[i+1].second.second ].first.first<<" "<<v[info[i+1].second.second ].first.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