Submission #1145735

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145735		Ice_man	Easter Eggs (info1cup17_eastereggs)	C++20	100 / 100	19 ms	23976 KiB

eastereggs

#include "grader.h"

#define maxn 1000005
#define maxlog 20
#define INF 1000000010
#define LINF 1000000000000000005
#define endl '\n'
#define pb(x) push_back(x)
#define X first
#define Y second
#define control cout<<"passed"<<endl;

using namespace std;


typedef unsigned long long ull;
typedef pair <int, int> pii;
typedef long long ll;
typedef pair <ll, ll> pll;
typedef pair <int, ll> pil;
typedef pair <ll, int> pli;
typedef long double pd;

vector <int> v[maxn];

vector <int> tour;
void gen(int node , int par)
{
    tour.pb(node);
    for(auto& e : v[node])
    {
        if(e == par)
            continue;
        gen(e , node);
    }
}

vector <int> pom;
bool check(int x)
{
    pom.clear();
    for(int i = 0; i <= x; i++)
        pom.pb(tour[i]);
    return query(pom);
}

int n;
int findEgg(int N , vector <pii> bridges)
{
    for(int i = 1; i <= n; i++)
        v[i].clear();
    tour.clear();

    n = N;

    for(auto& e : bridges)
    {
        v[e.X].pb(e.Y);
        v[e.Y].pb(e.X);
    }
    
    gen(1 , -1);
    
    /**int node = 1;
    while(v[node].size() == 0)
        node++;

    tour.pb(node);
    tour.pb(v[node][0]);

    for(int i = 1; i <= n; i++)
        tour.pb(i);*/

    int l = 0 , r = tour.size() - 1;
    int mid;
    while(r > l)
    {
        mid = (l + r) / 2;
        if(check(mid) == true)
            r = mid;
        else
            l = mid + 1;
    }

    return tour[l];
}

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