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Submission #742784

# Submission time Handle Problem Language Result Execution time Memory
742784 2023-05-16T23:26:26 Z Abrar_Al_Samit Easter Eggs (info1cup17_eastereggs) C++17
100 / 100
 18 ms 488 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;

const int nax = 513;
vector<int>g[nax];
vector<int>order;

void dfs(int v, int p = 0) {
    order.push_back(v);
    for(int u : g[v]) if(u!=p) {
        dfs(u, v);
    }
}
int findEgg (int N, vector<pair<int,int>>bridges) {
    for(int i=1; i<=N; ++i) {
        g[i].clear();
    }
    order.clear();

    for(int i=1; i<N; ++i) {
        auto [u, v] = bridges[i-1];
        g[u].push_back(v);
        g[v].push_back(u);
    }
    dfs(1);

    int lo = 0, hi = N;
    while(lo<hi-1) {
        int mid = (lo+hi)/2;

        vector<int>Qset = vector<int>(order.begin(), order.begin()+mid);
        if(query(Qset)) {
            hi = mid;
        } else {
            lo = mid;
        }
    }
    return order[lo];
}

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Number of queries: 4
2 Correct 1 ms 208 KB Number of queries: 4
3 Correct 1 ms 208 KB Number of queries: 4
4 Correct 1 ms 208 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 336 KB Number of queries: 8
2 Correct 12 ms 368 KB Number of queries: 9
3 Correct 18 ms 356 KB Number of queries: 9
4 Correct 14 ms 368 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 488 KB Number of queries: 9
2 Correct 14 ms 376 KB Number of queries: 9
3 Correct 13 ms 356 KB Number of queries: 9
4 Correct 13 ms 360 KB Number of queries: 9