Submission #918049

#	Time	Username	Problem	Language	Result	Execution time	Memory
918049		vjudge1	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	15 ms	1520 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
 
#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
    ios_base::sync_with_stdio(0);\
    cin.tie(0);\
    cout.tie(0)\
 
vi g[550], v;
int n;
 
void dfs(int node, int par){
    v.push_back(node);
    for(int i : g[node]){
        if(i == par)    continue;
        dfs(i, node);
    }
}
 
int findEgg(int N, vii bridges){
    n = N;
    for(int i = 1; i <= n; i++){
        g[i].clear();
    }
    for(pii i : bridges){
        g[i.first].push_back(i.second);
        g[i.second].push_back(i.first);
    }
    dfs(1, 1);
    int l = 0, r = n - 1, res = 0;
    while(l < r){
        int mid = (l + r) / 2;
        vi vv;
        for(int i = 0; i <= mid; i++)   vv.push_back(v[i]);
        if(query(vv)){
            res = mid;
            r = mid;
        }
        else{
            l = mid + 1;
        }
    }
    return v[l];
}

Compilation message (stderr)

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:41:27: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   41 |     int l = 0, r = n - 1, res = 0;
      |                           ^~~

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