Submission #270042

#	Time	Username	Problem	Language	Result	Execution time	Memory
270042		AKaan37	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	36 ms	768 KiB

eastereggs

//Bismillahirrahmanirrahim
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#include "grader.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 555;
const lo mod = 1000000007;

//~ vector<int> v;

int n,m,b[li],a[li],k,t,say,vis[li],mn[li],mx[li],mini,maxi,leaf,dep[li],isaretle[li],der,derin[li],leaff[li];

vector<int> vect[555];

inline void dfs(int node,int ata,int der){
	int flag=0;
	dep[node]=der;
	for(int i=0;i<(int)vect[node].size();i++){
		int go=vect[node][i];
		if(go==ata)continue;
		
		dfs(go,node,der+1);
		flag=1;
		//~ if(node==2)cout<<mn[go]<<endl;
		if(mn[node]==0)mn[node]=mn[go];
		else mn[node]=min(mn[node],mn[go]);
		mx[node]=max(mx[node],mx[go]);
	}
	if(flag==0){vis[node]=++say;leaff[say]=node;}
	if(flag==0)mn[node]=say;
	if(flag==0)mx[node]=say;
	//~ if(node==2)cout<<mn[2]<<"&&&&"<<endl;
}

vector<int> vec;

inline void push(int node,int ata){
	if(mn[node]<=maxi && mx[node]>=mini)vec.pb(node);
	for(int i=0;i<(int)vect[node].size();i++){
		int go=vect[node][i];
		if(go==ata)continue;
		push(go,node);
	}
}

inline void push1(int node,int ata){
	//~ cout<<node<<"(())\n";
	if(dep[node]<=der && isaretle[node]==0)vec.pb(node);
	derin[dep[node]]=node;
	for(int i=0;i<(int)vect[node].size();i++){
		int go=vect[node][i];
		if(go==ata)continue;
		//~ cout<<mn[go]<<" : : "<<mx[go]<<" : : "<<go<<endl;
		if(mn[go]>leaf || mx[go]<leaf)continue;
		push1(go,node);
	}
}

int findEgg (int N, vector < pair < int, int > > bridges)
{
	vec.clear();
	say=0;
	for(int i=1;i<=N;i++)vect[i].clear();
	for(int i=1;i<=N;i++)isaretle[i]=0;
	for(int i=1;i<=N;i++)mn[i]=0;
	for(int i=1;i<=N;i++)mx[i]=0;
	for(int i=1;i<=N;i++)leaff[i]=0;
	for(int i=1;i<=N;i++)dep[i]=0;
	for(int i=1;i<=N;i++)derin[i]=0;
	for(int i=1;i<=N;i++)vis[i]=0;
	for(int i=0;i<(int)bridges.size();i++){
		int x=bridges[i].fi;
		int y=bridges[i].se;
		//~ cout<<x<<" : : "<<y<<endl;
		vect[x].pb(y);
		vect[y].pb(x);
	}
	//~ vv.clear();
    //~ for(int i=1;i<=N;i++)if (query ({i})) return i;
    dfs(1,0,0);
    int bas=1;
    int son=say;
    while(bas<=son){
		vec.clear();
		mini=1;
		maxi=ort;
		push(1,0);
		if(query(vec))son=ort-1;
		else{
			for(int i=0;i<(int)vec.size();i++)isaretle[vec[i]]=1;
			bas=ort+1;
		}
	}
	//~ cout<<bas<<endl;
	leaf=bas;
	bas=0;
	son=dep[leaff[leaf]];
	while(bas<=son){
		vec.clear();
		der=ort;
		push1(1,0);
		//~ for(int i=0;i<(int)vec.size();i++)printf("%d\n",vec[i]);
		if(query(vec))son=ort-1;
		else bas=ort+1;
		//~ cout<<"\n"<<"\n";
	}
	//~ cout<<bas<<endl;
	//~ cout<<vv[bas]<<endl;
	//~ if(bas>dep[leaff[leaf]])return 0;
    return derin[bas];
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20