Submission #374976

#	Time	Username	Problem	Language	Result	Execution time	Memory
374976		BartolM	Meetings (JOI19_meetings)	C++17	100 / 100	724 ms	1024 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;
const int N=2005;

int n, uk;
int bio[N];

#define DEBUG 0
void upit(int x, int y) {
    #if DEBUG
        printf("%d <-> %d\n", x, y);
    #endif
    Bridge(min(x, y), max(x, y));
}

void rek(vector <int> v) {
    if (v.size()==1) return;

    for (int x:v) bio[x]=0;
    random_shuffle(v.begin(), v.end());
    int l=v[0], r=v[1];

    vector <int> v_l, v_r;
    v_l.pb(l); v_r.pb(r);
    bio[l]=bio[r]=1;

    for (int x:v) {
        if (x==l || x==r || bio[x]) continue;
        int y=Query(x, l, r);
        if (y==l) v_l.pb(x);
        else if (y==r) v_r.pb(x);
        else {
            if (v_l.size()<v_r.size()) {
                v_l.pb(x), bio[x]=1;
                l=y;
                if (y!=x) v_l.pb(y), bio[y]=1;
            }
            else {
                v_r.pb(x), bio[x]=1;
                r=y;
                if (y!=x) v_r.pb(y), bio[y]=1;;
            }
        }
    }
    upit(l, r);
    rek(v_l); rek(v_r);
}

void Solve(int nn) {
    n=nn;
    srand(time(0));
    vector <int> poc;
    for (int i=0; i<n; ++i) poc.pb(i);
    rek(poc);
}
/*
5
0 1
0 2
1 3
1 4
*/

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 71 / 71