Submission #569936

#	Time	Username	Problem	Language	Result	Execution time	Memory
569936		beedle	Game (IOI14_game)	C++17	42 / 100	1085 ms	12704 KiB

game

#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <set>
#include <iterator>
#include <stack>
#include <map>
#include <math.h>
#include <bitset>
#include <deque>
#include <string>
#include <tuple>
#include <queue>
#include <numeric>
#include <unordered_set>
#include <unordered_map>
#define pi 3.141592653589793238
#define ll long long
#define ld long double
#define rep(i, a, b) for (long long i = a; i <= b; i++)
#define mod 1000000007ll
#define INF 1000000000000000000
#define pb push_back
#define ff first
#define ss second
#define endl '\n'
#define all(x) (x).begin (), (x).end ()
#define sz(x) (ll) (x).size ()
#define reunique(v) v.resize(std::unique(v.begin(), v.end()) - v.begin())
#define rank rnk
#define log lg
#define fast                                                                  \
    ios_base::sync_with_stdio (false);                                        \
    cin.tie (NULL);                                                           \
    cout.tie (NULL)
 
using namespace std;

int n;
vector <set<int>> adj;
vector <bool> visited;

void dfs(int v)
{
    visited[v]=true;
    for(auto u:adj[v])
    if(!visited[u])
    dfs(u);
}

bool is_connected()
{
    visited.assign(n,false);
    dfs(0);
    bool ok=true;
    rep(i,0,n-1)
    ok=(ok&visited[i]);
    return ok;
}

void initialize(int _n)
{
    n=_n;
    rep(i,0,n-1)
    {
        set <int> s;
        rep(j,0,n-1)
        if(j!=i)
        s.insert(j);
        adj.pb(s);
    }
}

int hasEdge(int u, int v)
{
    adj[v].erase(u);
    adj[u].erase(v);

    if(is_connected())
    return false;
    else
    {
        adj[u].insert(v);
        adj[v].insert(u);
        return true;
    }
}

// signed main()
// {
//     fast;

//     initialize(4);
//     cout<<hasEdge(0,3);
//     cout<<hasEdge(0,1);
//     cout<<hasEdge(0,2);
//     cout<<hasEdge(1,3);
//     cout<<hasEdge(1,2);
//     cout<<hasEdge(2,3);

//     return 0;
// }

• Subtask 1: 15 / 15
• Subtask 2: 27 / 27
• Subtask 3: 0 / 58