Submission #249453

#	Time	Username	Problem	Language	Result	Execution time	Memory
249453		dantoh000	Meetings (JOI19_meetings)	C++14	29 / 100	2635 ms	904 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
void solve(vector<int> v){
    /*printf("solving ");
    for (auto x : v) printf("%d ",x);
    printf("\n");*/
    if (v.size() == 1) return;
    if (v.size() == 2){
        if (v[0] > v[1]) swap(v[0],v[1]);
        Bridge(v[0],v[1]);
        return;
    }
    random_shuffle(v.begin(),v.end());
    int p = v[0], q = v[1];
    //printf("cur %d, root %d\n",cur,root);
    for (auto x : v){
        if (x == p || x == q) continue;
        int Q = Query(p,q,x);
        if (Q != p) q = Q;
    }
    //printf("cur %d, root %d\n",cur,root);
    if (p > q) swap(p,q);
    Bridge(p,q);
    vector<int> L, R;
    for (auto x : v){
        if (x == q || x == p) continue;
        int Q = Query(p,q,x);
        assert(Q == p || Q == q);
        if (Q == p) R.push_back(x);
        else L.push_back(x);
    }
    L.push_back(q);
    R.push_back(p);
    solve(L);
    solve(R);
}
void Solve(int N) {
    vector<int> cur;
    for (int i = 0; i < N; i++) cur.push_back(i);
    solve(cur);
}

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 0 / 71