oj.uz

Submission #817838

# Submission time Handle Problem Language Result Execution time Memory
817838 2023-08-09T17:44:26 Z alvingogo Fountain Parks (IOI21_parks) C++17
5 / 100
 729 ms 46688 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},0);
            }
        }
    }
    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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 296 KB Output is correct
23 Correct 572 ms 36556 KB Output is correct
24 Incorrect 1 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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 296 KB Output is correct
23 Correct 572 ms 36556 KB Output is correct
24 Incorrect 1 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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 KB Output is correct
17 Incorrect 1 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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 KB Output is correct
17 Incorrect 729 ms 46688 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 1 ms 300 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 177 ms 18564 KB Output is correct
10 Correct 13 ms 2336 KB Output is correct
11 Correct 57 ms 10184 KB Output is correct
12 Correct 14 ms 3392 KB Output is correct
13 Correct 36 ms 7104 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 572 KB Output is correct
16 Correct 158 ms 18552 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 296 KB Output is correct
23 Correct 572 ms 36556 KB Output is correct
24 Incorrect 1 ms 212 KB Edge between 7 and 6 appears more than once: appeared on positions 2 and 5
25 Halted 0 ms 0 KB -