Submission #703958

#	Time	Username	Problem	Language	Result	Execution time	Memory
703958		boyliguanhan	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	22 ms	464 KiB

eastereggs

#include "grader.h"

using namespace std;
vector<int> order;
vector<int> adj[513];
void dfs(int n, int p) {
    order.push_back(n);
    for (auto i : adj[n])
        if (i != p)
            dfs(i, n);
}
int findEgg(int N, vector < pair < int, int > > bridges)
{
    order.clear();
    for (int i = 1; i <= N; i++)
        adj[i].clear();
    for (auto i : bridges)
        adj[i.first].push_back(i.second), adj[i.second].push_back(i.first);
    dfs(1, 0);
    int l = 1, r = N;
    while (l < r) {
        int mid = l + r >> 1;
        if (query(vector<int>(order.begin(), order.begin() + mid)))
            r = mid;
        else
            l = mid + 1;
    }
    return order[l - 1];
}

Compilation message (stderr)

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:22:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |         int mid = l + r >> 1;
      |                   ~~^~~

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