Submission #494732

#	Time	Username	Problem	Language	Result	Execution time	Memory
494732		Khizri	Fountain Parks (IOI21_parks)	C++17	0 / 100	0 ms	204 KiB

parks

#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define F first
#define S second
const int mxn=2e5+5;
int n,color[5][mxn],arr[5][mxn],say;
int l[4]={0,0,2,-2};
int r[4]={2,-2,0,0};
vector<int>a,b,c,d;
void dfs(int x,int y){
    //cout<<x<<' '<<y<<endl;
    color[x][y]=1;
    say++;
    for(int i=0;i<4;i++){
        int u=x+l[i],v=y+r[i];
        if(arr[u][v]&&!color[u][v]){
            a.pb(arr[x][y]-1);
            b.pb(arr[u][v]-1);
            c.pb(x+1);
            d.pb((v+y)/2);
            dfs(u,v);
        }
    }
}
int construct_roads(vector<int> x, vector<int> y) {
    n=x.size();
    int pos=1e7;
    for(int i=0;i<n;i++){
        pos=min(pos,y[i]);
        arr[x[i]][y[i]]=i+1;
    }
    dfs(2,pos);
    if(say==n){
        build(a,b,c,d);
        return 1;
    }
    return 1;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30