Submission #946252

#	Time	Username	Problem	Language	Result	Execution time	Memory
946252		Ahmed57	Parking (CEOI22_parking)	C++17	10 / 100	1 ms	604 KiB

Main

#include "bits/stdc++.h"
using namespace std;
vector<int> v[5];
vector<pair<int,int>> con,all;
int lim = 5 , mi = 1e9 , m;
void rec(int dep){
    if(dep>lim)return ;
    bool ss = 1;
    for(int i = 0;i<m;i++){
        if(v[i].size()==1){ss = 0;break;}
        if(v[i].size()){
            if(v[i][0]!=v[i][1])ss = 0;
        }
    }
    if(ss){
        if(mi>dep){
            mi =dep;
            all.clear();
            all = con;
        }
        return ;
    }
    for(int i = 0;i<m;i++){
        if(v[i].empty())continue;
        for(int j = 0;j<m;j++){
            if(v[j].size()==2||i==j)continue;
            con.push_back({i+1,j+1});
            int x = v[i].back();v[i].pop_back();
            v[j].push_back(x);
            rec(dep+1);
            con.pop_back();
            x = v[j].back();v[j].pop_back();
            v[i].push_back(x);
        }
    }
}
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);
    int n;
    cin>>n>>m;
    for(int i = 0;i<m;i++){
        int a,b;cin>>a>>b;
        if(a!=0)v[i].push_back(a);
        if(b!=0)v[i].push_back(b);
    }
    rec(0);
    if(mi==1e9){
        cout<<-1<<endl;
        return 0;
    }
    cout<<mi<<endl;
    for(auto i:all){
        cout<<i.first<<" "<<i.second<<endl;
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 25
• Subtask 4: 0 / 15
• Subtask 5: 0 / 25
• Subtask 6: 0 / 15