Submission #1145922

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145922		sash01	Easter Eggs (info1cup17_eastereggs)	C++20	0 / 100	0 ms	452 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
vector <int> v1[513],an;
vector <int> ans;
bool used[555];
void dfs(int beg)
{
    an.push_back(beg);
    used[beg]=1;
    int sz=v1[beg].size(),nb;
    for(int i=0;i<sz;i++)
    {
        nb=v1[beg][i];
        if(!used[nb])dfs(nb);
    }
}
int findEgg (int n, vector < pair < int, int > > bridges)
{
    memset(used,0,sizeof(used));
    for(int i=1;i<=512;i++)v1[i].clear();
    an.clear();
    for(int i=0;i<n-1;i++)
    {
        v1[bridges[i].first].push_back(bridges[i].second);
    }
    dfs(1);
    int l=1,r=n,m,ot;
    while(l<r)
    {
        m=(l+r)/2;
        ans.clear();
        for(int i=1;i<=m;i++)ans.push_back(an[i-1]);
        if(query(ans)==1){ot=m;r=m;}
        else l=m+1;
    }
    return ot;
}

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