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Submission #1048801

# Submission time Handle Problem Language Result Execution time Memory
1048801 2024-08-08T09:34:52 Z Whisper Easter Eggs (info1cup17_eastereggs) C++17
0 / 100
 1 ms 344 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;
using ll = long long;

int findEgg (int _N, vector<pair<int, int>> bridges){
    int N = _N;
    vector<vector<int>> G(N + 5);
    for (pair<int, int>&x : bridges){
        int u = x.first, v = x.second;
        G[u].emplace_back(v);
        G[v].emplace_back(u);
    }
    vector<int> minDist(N + 5), rev(N + 5);
    queue<int> q;
    q.emplace(1);
    minDist[1] = 1; rev[1] = 1;
    int cnt = 1;
    while(q.size()){
        int u = q.front(); q.pop();
        for (int &v : G[u]){
            if (!minDist[v]){
                q.emplace(v);
                minDist[v] = ++cnt;
                rev[minDist[v]] = v;
            }
        }
    }
    int l = 1, r = N;

    auto check = [&](int x) -> bool{
        vector<int> node;
        for (int i = 1; i <= N; ++i) if(minDist[i] <= x){
            node.emplace_back(x);
        }
        return query(node);
    };
//    int ans = 0;
//    while (l <= r){
//        int m = (l + r) >> 1;
//        if(check(m)) ans = m, r = m - 1;
//        else l = m + 1;
//    }
    return 0;
}

Compilation message

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:30:9: warning: unused variable 'l' [-Wunused-variable]
   30 |     int l = 1, r = N;
      |         ^
eastereggs.cpp:30:16: warning: unused variable 'r' [-Wunused-variable]
   30 |     int l = 1, r = N;
      |                ^
eastereggs.cpp:32:10: warning: variable 'check' set but not used [-Wunused-but-set-variable]
   32 |     auto check = [&](int x) -> bool{
      |          ^~~~~

Subtask #1
0.0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB The found island is incorrect
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 0 ms 344 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 344 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -