Submission #127653

#	Time	Username	Problem	Language	Result	Execution time	Memory
127653		chubyxdxd	Simurgh (IOI17_simurgh)	C++11	0 / 100	2 ms	256 KiB

simurgh

#include "simurgh.h"
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef pair<ll,ll> ii;
std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v){
	ll tam=u.size();
	//initset(tam);
	map<ll,ii> mp;
	set<ll> se;
	for(ll i=0; i<tam; i++){
		//unionset(u[i],v[i]);
		mp[i]=ii(v[i],u[i]);
	}
	vector<int> r;
	//int f=0;
	//cout<<(1<<tam)<<endl;
	for(ll i=pow(2,n-1)-1;i<(1<<tam);i++){
		ll h=__builtin_popcount(i);
		//cout<<i<<" tiene "<<h<<" bits prendidos "<<endl;
		if(h!=n-1){
			continue;
		}
		else{
			se.clear();
			r.clear();
			//cout<<i<<" = "<<h<<endl;
			for(ll j=0;j<tam;j++){
				if(i&(1<<j)){
					r.push_back(j);
				}
			}
			ll l=r.size();
			/*for(int j=0;j<l;j++){
				cout<<r[j]<<" ";
			}
			cout<<endl;*/
			for(ll j=0;j<l;j++){
				se.insert(mp[r[j]].first);
				se.insert(mp[r[j]].second);
			}

			ll k=se.size();
			if(k==n){
				//f++;
				//cout<<i<<endl;
				ll common=count_common_roads(r);
				if(common==n-1){
					//cout<<f<<endl;
					return r;
				}
			}
		}
	}
	return r;
	//int common=count_common_roads(r);
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30