Submission #391895

#	Time	Username	Problem	Language	Result	Execution time	Memory
391895		Pichon5	Split the Attractions (IOI19_split)	C++17	0 / 100	600 ms	1048580 KiB

split

#include "split.h"
#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
using namespace std;
vi res;
vector<vi>G;
vector<pair<int,int> >v;
bool ok=false;
vi peso;
int n;
void dfs1(int nodo, int p){//esto es para flutfitear el mas bajito
    if(v[0].F==0)return;
    res[nodo]=v[0].S;
    v[0].F--;
    for(auto it : G[nodo]){
        if(it==p)continue;
        dfs1(it,nodo);
    }
}
void dfs2(int nodo, int p){
    if(v[1].F==0)return;
    res[nodo]=v[1].S;
    v[1].F--;
    for(auto it : G[nodo]){
        if(it==p)continue;
        dfs2(it,nodo);
    }
}
void check(int nodo, int p){
    for(auto it : G[nodo]){
        if(it==p)continue;
        check(it,nodo);
        peso[nodo]+=peso[it];
        if(peso[it]>=v[0].F && n-v[0].F>=v[1].F && ok==0){
            ok=1;
            dfs1(it,nodo);
            dfs2(nodo,it);
        }
        if(peso[it]>=v[1].F && n-v[1].F>=v[0].F && ok==0){
            ok=1;
            dfs1(nodo,it);
            dfs2(it,nodo);
        }
    }
    peso[nodo]++;
}

vector<int> find_split(int N, int a, int b, int c, vector<int> p, vector<int> q) {
    int m=p.size();
    n=N;
    G.assign(n,vi());
    peso.resize(n+1,0);
    for(int i=0;i<m;i++){
        G[p[i]].pb(q[i]);
        G[q[i]].pb(p[i]);
    }
    v.pb({a,1});v.pb({b,2});v.pb({c,3});
    sort(v.begin(),v.end());
    res.assign(n,v[2].S);
    check(0,-1);
    if(!ok)res.assign(n,0);
	return res;
}
/*
10 9
6 2 2
0 1
0 2
0 3
3 4
4 8
8 9
4 7
3 5
3 6
*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36