Submission #703395

#	Time	Username	Problem	Language	Result	Execution time	Memory
703395		alvingogo	Meetings (JOI19_meetings)	C++14	100 / 100	610 ms	2376 KiB

meetings

#include <bits/stdc++.h>
#include "meetings.h"
#pragma GCC optimize("Ofast")
#define AquA cin.tie(0);ios_base::sync_with_stdio(0);
#define fs first
#define sc second
#define p_q priority_queue
using namespace std;

mt19937 rnd(time(NULL));
map<pair<int,pair<int,int> >,int> mp;
int get(int a,int b,int c){
    if(a>b){
        swap(a,b);
    }
    if(b>c){
        swap(b,c);
    }
    if(a>b){
        swap(a,b);
    }
    if(a==b || b==c){
        return b;
    }
    if(mp.find({a,{b,c}})!=mp.end()){
        return mp[{a,{b,c}}];
    }
    return mp[{a,{b,c}}]=Query(a,b,c);
}
void dc(vector<int>& v){
    int n=v.size();
    if(n<=1){
        return;
    }
    if(n==2){
        Bridge(min(v[0],v[1]),max(v[0],v[1]));
        return;
    }
    int x=v[0],y=v[1];
    map<int,vector<int> > m;
    vector<int> g;
    for(auto h:v){
        int a=get(x,y,h);
        m[a].push_back(h);
        if(a==h){
            g.push_back(h);
        }
    }
    for(auto h:m){
        dc(h.sc);
    }
    sort(g.begin(),g.end(),[&](int a,int b){
        return get(x,a,b)==a;
    });
    for(int i=0;i+1<g.size();i++){
        Bridge(min(g[i],g[i+1]),max(g[i],g[i+1]));
    }






}
void Solve(int n){
    vector<int> v(n);
    iota(v.begin(),v.end(),0);
    shuffle(v.begin(),v.end(),rnd);
    dc(v);
}

Compilation message (stderr)

meetings.cpp: In function 'void dc(std::vector<int>&)':
meetings.cpp:55:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |     for(int i=0;i+1<g.size();i++){
      |                 ~~~^~~~~~~~~

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