Submission #918122

#	Time	Username	Problem	Language	Result	Execution time	Memory
918122		vjudge1	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	13 ms	1244 KiB

eastereggs

#include            <bits/stdc++.h>
#include            "grader.h"
#define pb          push_back
#define pii         pair<int, int>
#define pll         pair<ll, ll>
#define vll         vector<ll>
#define all(v)      v.begin(), v.end()
#define whole(a)    a+1, a+1+n
#define OPT         ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define sec         second
#define fi          first
#define print(k)    cerr << "Ans : "; cout << k << endl;
#define ins         insert
#define pb          push_back 
#define bpc         __builtin_popcountll
#define skip        continue
#define endll          '\n'
#define gcd(a, b)   __gcd(a, b)
#define lcm(a, b)   a*b / (__gcd(a, b))
#define mpr         make_pair
#define rep(i,l,r)  for(ll i=l;i<=r;++i)
#define new         '\n'
typedef long long ll;
typedef unsigned long long ull;
const int mod = 998244353;
const int sz = 3e5+5;
using namespace std;
int dx[4] = {1,0,-1,0};
int dy[4] = {0,1,0,-1};

vector<int>v;
vector<int>g[600];

void dfs(int node, int par)
{
    v.pb(node);
    for(int i:g[node])
    {
        if(i == par)
        {
            continue;
        }
        dfs(i, node);
    }
}

int findEgg (int n, vector<pair<int, int>> b)
{
    v.clear();
    for(int i = 0; i <= n; ++i)
    {
        g[i].clear();
    }
    for(pii p:b)
    {
        g[p.first].pb(p.second);
        g[p.second].pb(p.first);
    }
    dfs(1, 1);
    int l = 0, r = v.size()-1;

    while(l < r)
    {
        int mid = ( l + r ) >> 1;
        vector<int> w;
        for( int i = 0; i <= mid; ++i){
            w.pb(v[i]);
        }
        if(query(w))
        {
            r = mid;
        }
        else{
            l = mid + 1;
        }
    }
    return v[l];
}

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