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Submission #49392

# Submission time Handle Problem Language Result Execution time Memory
49392 2018-05-28T09:33:53 Z georgerapeanu Easter Eggs (info1cup17_eastereggs) C++11
0 / 100
 4 ms 764 KB 
#include <bits/stdc++.h>
#include "grader.h"

using namespace std;

vector<int> G[600];
int renumbered[600];
int inverse_renumber[600];


void renumber_dfs(int node,int father,int &val){
    renumbered[node] = val;
    inverse_renumber[val] = node;
    for(auto it:G[node]){
        if(it != father){
            renumber_dfs(it,node,++val);
        }
    }
}

bool ok(int le,int ri){
    vector<int> nodes;
    for(int i = le;i <= ri;i++){
        nodes.push_back(inverse_renumber[i]);
    }
    return query(nodes);
}

bool done_before = 0;

int findEgg (int N, vector < pair < int, int > > bridges){
    if(!done_before){
        for(auto it:bridges){
            G[it.first].push_back(it.second);
            G[it.second].push_back(it.first);
        }
        int start = 1;
        renumber_dfs(1,0,start);
        done_before = 1;
    }
    int lo = 1,hi = N;
    while(hi - lo > 0){
        int mid = (lo + hi) / 2;
        if(ok(lo,mid)){
            hi = mid;
        }
        else{
            lo = mid + 1;
        }
    }
    return inverse_renumber[lo];
}

Subtask #1
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Number of queries: 4
2 Runtime error 3 ms 564 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 672 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 4 ms 764 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -