Submission #895620

#	Time	Username	Problem	Language	Result	Execution time	Memory
895620		maxFedorchuk	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	11 ms	1872 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
using ll = long long;
 
vector<int> v[1010], l;
 
void dfs(int u, int p) {
    l.push_back(u);
    for(auto x : v[u]) if(x != p) dfs(x, u);
}
 
int findEgg(int N, vector<pair<int, int>> bridges) {
    for(int i=1;i<=N;i++) v[i].clear();
    for(auto [x, y] : bridges) v[x].push_back(y), v[y].push_back(x);
    dfs(1, 0);
 
    int L = 0, R = N-2;
    while(L <= R) {
        int M = (L+R)/2;
        if(query(vector<int>(l.begin(), l.begin()+M+1))) R = M-1;
        else L = M+1;
    }
    return l[L];
}

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