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Submission #918112

# Submission time Handle Problem Language Result Execution time Memory
918112 2024-01-29T13:10:16 Z raul2008487 Easter Eggs (info1cup17_eastereggs) C++17
87 / 100
 29 ms 5960 KB 
#include <bits/stdc++.h>
#include "grader.h"
#define ll int
#define vl vector<ll>
#define fi first
#define se second
#define pb push_back

using namespace std;
const int sz = 2e5+5;
vl adj[sz];
vl et;
void dfs(ll node, ll p){
    et.pb(node);
    for(auto edge: adj[node]){
        if(edge == p){continue;}
        dfs(edge, node);
    }
}
int findEgg (int N, vector < pair < int, int > > bridges)
{
    ll i, j;
    for(i=0;i<sz;i++){
        adj[i].clear();
    }
    et.clear();
    et.pb(-1);
    for(i=0;i<bridges.size();i++){
        adj[bridges[i].fi].push_back(bridges[i].se);
        adj[bridges[i].se].push_back(bridges[i].fi);
    }
    dfs(1, 0);
    ll lo = 1, hi = N, mid, best = 0;
    while(lo <= hi){
        mid = (lo + hi) >> 1;
        vl t;
        for(i = 1; i<=mid; i++){
            t.pb(et[i]);
        }
        if(query(t)){
            best = et[mid];
            hi = mid - 1;
        }
        else{
            lo = mid + 1;
        }
    }
    return best;
}

Compilation message

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:28:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(i=0;i<bridges.size();i++){
      |             ~^~~~~~~~~~~~~~~
eastereggs.cpp:22:11: warning: unused variable 'j' [-Wunused-variable]
   22 |     ll i, j;
      |           ^

Subtask #1
32.0 / 40.0

# Verdict Execution time Memory Grader output
1 Partially correct 5 ms 4952 KB Number of queries: 5
2 Partially correct 4 ms 4952 KB Number of queries: 5
3 Partially correct 4 ms 4952 KB Number of queries: 5
4 Partially correct 4 ms 4952 KB Number of queries: 5

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 5468 KB Number of queries: 9
2 Correct 14 ms 5672 KB Number of queries: 9
3 Correct 20 ms 5420 KB Number of queries: 9
4 Correct 20 ms 5436 KB Number of queries: 9

Subtask #3
15.0 / 20.0

# Verdict Execution time Memory Grader output
1 Partially correct 20 ms 5960 KB Number of queries: 10
2 Correct 21 ms 5932 KB Number of queries: 9
3 Partially correct 21 ms 5424 KB Number of queries: 10
4 Partially correct 29 ms 5424 KB Number of queries: 10