Submission #918095

#	Time	Username	Problem	Language	Result	Execution time	Memory
918095		raul2008487	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	9 ms	10052 KiB

eastereggs

#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 = lo; i<=mid; i++){
            t.pb(et[i]);
        }
        if(query(t)){
            best = et[mid];
            hi = mid - 1;
        }
        else{
            lo = mid + 1;
        }
    }
    return best;
}

Compilation message (stderr)

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: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20