oj.uz

Submission #817839

# Submission time Handle Problem Language Result Execution time Memory
817839 2023-08-09T17:45:41 Z alvingogo Fountain Parks (IOI21_parks) C++17
5 / 100
 641 ms 46500 KB 
#include "parks.h"
#include <bits/stdc++.h>
#define fs first
#define sc second
#define p_q priority_queue
using namespace std;
struct DSU{
    vector<int> bo,ss;
    void init(int x){
        bo.resize(x);
        ss.resize(x,1);
        iota(bo.begin(),bo.end(),0);
    }  
    int find(int x){
        return bo[x]==x?x:bo[x]=find(bo[x]);
    }
    int merge(int x,int y){
        x=find(x);
        y=find(y);
        if(x==y){
            return 0;
        }
        bo[x]=y;
        ss[y]+=ss[x];
        return 1;
    }
}dsu;

vector<int> au,av,aa,ab;
set<pair<int,int> > vis;
void ag(int a,int b,int c,int d){
    au.push_back(a);
    av.push_back(b);
    dsu.merge(a,b);
    aa.push_back(c);
    ab.push_back(d);
    vis.insert({c,d});
    //cout << a << " " << b << " " << c << " " << d << '\n';
}
int construct_roads(vector<int> x, vector<int> y) {
    vis.clear();
    if (x.size() == 1) {
	    build({}, {}, {}, {});
        return 1;
    }
    map<pair<int,int>,int> mp;
    int n=x.size();
    for(int i=0;i<n;i++){
        mp[{x[i],y[i]}]=i;
    }
    dsu.init(n);
    const int dx[4]={0,0,2,-2},dy[4]={2,-2,0,0};
    function<void(pair<int,int>,int)> dfs=[&](pair<int,int> w,int q){
        int a=0,b=0,c=0,d=0;
        if(dx[q]){
            a=b=dx[q]/2;
            c=1;
            d=-1;
        }
        else{
            a=1;
            b=-1;
            c=d=dy[q]/2;
        }
        int e=0,f=0,g=0,h=0;
        int way=2*(1-q/2);
        if(mp.find({w.fs+a,w.sc+c})==mp.end()){
            if(mp.find({w.fs+b,w.sc+d})==mp.end()){
                return;
            }
            way++;
        }
        if(dx[way]){
            e=f=dx[way]/2;
            g=1;
            h=-1;
        }
        else{
            e=1;
            f=-1;
            g=h=dy[way]/2;
        }
        for(int i=w.fs,j=w.sc;;i+=dx[way],j+=dy[way]){
            int sx=i+e,sy=j+g,tx=i+f,ty=j+h;
            if(mp.find({sx,sy})==mp.end() || mp.find({tx,ty})==mp.end()){
                if(way<2){
                    assert(mp.find({sx-dx[way],sy-dy[way]})!=mp.end());
                    assert(mp.find({tx-dx[way],ty-dy[way]})!=mp.end());
                    ag(mp[{sx-dx[way],sy-dy[way]}],mp[{tx-dx[way],ty-dy[way]}],i,j);
                }
                dfs({i,j},way);
                break;
            }
            else{
                if(vis.find({i+dx[way],j+dy[way]})!=vis.end()){
                    break;
                }
                if(way>=2){
                    ag(mp[{sx,sy}],mp[{tx,ty}],i+dx[way],j+dy[way]);
                }
            }
        }
    };
    for(int p=0;p<n;p++){
        int c=x[p]+2,d=y[p];
        if(mp.find({c,d})!=mp.end()){
            if(mp.find({x[p]+2,y[p]+2})!=mp.end() && mp.find({x[p],y[p]+2})!=mp.end()){
                continue;
            }
            int a=mp[{c,d}];
            if(vis.find({x[p]+1,y[p]+1})==vis.end()){
                ag(a,p,x[p]+1,y[p]+1);
                dfs({x[p]+1,y[p]+1},0);
            }
        }
    }
    for(int p=0;p<n;p++){
        int c=x[p]+2,d=y[p];
        if(mp.find({c,d})!=mp.end()){
            if(mp.find({x[p]+2,y[p]-2})!=mp.end() && mp.find({x[p],y[p]-2})!=mp.end()){
                continue;
            }
            int a=mp[{c,d}];
            if(vis.find({x[p]+1,y[p]-1})==vis.end()){
                ag(a,p,x[p]+1,y[p]-1);
                dfs({x[p]+1,y[p]-1},1);
            }
        }
    }
    for(int p=0;p<n;p++){
        int c=x[p],d=y[p]+2;
        if(mp.find({c,d})!=mp.end()){
            int a=mp[{c,d}];
            if(vis.find({x[p]+1,y[p]+1})==vis.end()){
                ag(a,p,x[p]+1,y[p]+1);
            }
            else if(vis.find({x[p]-1,y[p]+1})==vis.end()){
                ag(a,p,x[p]-1,y[p]+1);
            }
        }
    }
    if(dsu.ss[dsu.find(0)]!=n){
        return 0;
    }
    build(au,av,aa,ab);
    return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 517 ms 36264 KB Output is correct
24 Incorrect 0 ms 212 KB Edge between 7 and 6 appears more than once: appeared on positions 2 and 5
25 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 517 ms 36264 KB Output is correct
24 Incorrect 0 ms 212 KB Edge between 7 and 6 appears more than once: appeared on positions 2 and 5
25 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct
17 Incorrect 0 ms 212 KB Edge between 0 and 2 appears more than once: appeared on positions 0 and 2
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct
17 Incorrect 641 ms 46500 KB Edge between 168975 and 0 appears more than once: appeared on positions 0 and 100002
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 153 ms 18200 KB Output is correct
10 Correct 10 ms 2260 KB Output is correct
11 Correct 61 ms 9956 KB Output is correct
12 Correct 14 ms 3284 KB Output is correct
13 Correct 41 ms 6848 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 156 ms 18380 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 517 ms 36264 KB Output is correct
24 Incorrect 0 ms 212 KB Edge between 7 and 6 appears more than once: appeared on positions 2 and 5
25 Halted 0 ms 0 KB -