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Submission #498738

# Submission time Handle Problem Language Result Execution time Memory
498738 2021-12-26T09:25:37 Z ahmedfouadnew Easter Eggs (info1cup17_eastereggs) C++17
81 / 100
 27 ms 408 KB 
#include <bits/stdc++.h>
#include "grader.h"
//#include "grader.cpp"
#define pb push_back
#define f first
#define s second
using namespace std;
vector<int>adj[606];
int n;
vector<int>vv;
void dfs(int u,int p)
{
    vv.pb(u);
    for(int v:adj[u])
    {
        if(v==p) continue;

        dfs(v,u);
        vv.pb(u);
    }
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
    if(N==1) return 1;
    for(int i=0;i<=N;i++)
    {
        adj[i].clear();
    }
    vv.clear();
    n=N;
    for(int i=0;i<bridges.size();i++)
    {
        adj[bridges[i].f].pb(bridges[i].s);
        adj[bridges[i].s].pb(bridges[i].f);
    }
    dfs(rand()%n+1,0);
    int s=0,e=vv.size()-2;
    while(s<e)
    {
        int mid=s+(e-s)/2;

        set<int>st;
        for(int i=s;i<=e;i++)
        {
            st.insert(vv[i]);
        }
        if(st.size()==1) return vv[s];
        st.clear();
        for(int ii=s;ii<=mid;ii++)
            st.insert(vv[ii]);
        vector<int>qr(st.begin(),st.end());
        if(query(qr))
        {
            e=mid;
        }
        else
        {
            s=mid+1;
        }
    }
    return vv[s];
}

Compilation message

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i=0;i<bridges.size();i++)
      |                 ~^~~~~~~~~~~~~~~

Subtask #1
32.0 / 40.0

# Verdict Execution time Memory Grader output
1 Partially correct 2 ms 200 KB Number of queries: 5
2 Partially correct 2 ms 200 KB Number of queries: 5
3 Partially correct 1 ms 200 KB Number of queries: 5
4 Partially correct 1 ms 200 KB Number of queries: 5

Subtask #2
34.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 356 KB Number of queries: 9
2 Partially correct 12 ms 328 KB Number of queries: 10
3 Partially correct 20 ms 328 KB Number of queries: 10
4 Partially correct 17 ms 328 KB Number of queries: 10

Subtask #3
15.0 / 20.0

# Verdict Execution time Memory Grader output
1 Partially correct 24 ms 408 KB Number of queries: 10
2 Partially correct 22 ms 328 KB Number of queries: 10
3 Partially correct 27 ms 376 KB Number of queries: 10
4 Partially correct 21 ms 328 KB Number of queries: 10