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Submission #436632

# Submission time Handle Problem Language Result Execution time Memory
436632 2021-06-24T17:09:31 Z Apiram Fountain Parks (IOI21_parks) C++17
5 / 100
 3500 ms 33436 KB 
#include "parks.h"
#include<bits/stdc++.h>
using namespace std;
vector<int>parent(1e6);
vector<int>siz(1e6);
void makesets(int v){
	parent[v]=v;
	siz[v]=1;
}
int findsets (int v){
	if (v==parent[v])return v;
	parent[v]=findsets(parent[v]);
	return parent[v];
}
void unionset(int a,int b){
	a = findsets(a);
	b =findsets(b);
	if (a==b)return;
	if (siz[a]<siz[b])swap(a,b);
	siz[a]+=siz[b];
	parent[b]=a;
}
void build(vector<int> u, vector<int> v, vector<int> a, vector<int> b);
struct point {
	int x,y,index;
};
bool dist(point x,point y){
	if (pow(x.x - y.x,2)+pow(x.y-y.y,2)!=4)return false;
	return true;
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
    vector<point>arr;
    int n = x.size();
    bool ok=true;
    
    for (int i = 0 ;i<n;++i){
    	if (x[i]!=x[0])ok=false;
    	arr.push_back({x[i],y[i],i});
    }
    vector<int>ansx,ansy,ansxi,ansyi;
    if (ok){
    sort(arr.begin(),arr.end(),[&](point a,point b){
    	return a.y<b.y;
    });
    
    for (int i = 1;i<n;++i){
    	if (dist(arr[i],arr[i-1])){
    		ansx.push_back(min(arr[i].x,arr[i-1].x) + 1);
    		ansy.push_back(min(arr[i].y,arr[i-1].y)+1);
    		ansxi.push_back(arr[i].index);
    		ansyi.push_back(arr[i-1].index);
    	}
    	else return 0;
    }
    build(ansxi,ansyi,ansx,ansy);
    return 1;}
    else{
    	for (int i =0;i<n;++i){
    		makesets(i);
    	}
    	set<pair<int,int>>p;
    	sort(arr.begin(),arr.end(),[&](point a,point b){
    		if (a.x==b.x)return a.y<b.y;
    		return a.x<b.x;
    });
    
    	
   	for (int k =0;k<n;++k){
    	for (int j =k+1;j<n;++j){
    		if (dist(arr[j],arr[k])&&findsets(j)!=findsets(k)){
    			int first1=min(arr[k].x,arr[j].x) + 1;
    		int first2=min(arr[k].x,arr[j].x) + 1;
    		int second1=min(arr[k].y,arr[j].y) + 1;
    		int second2 = min(arr[k].y,arr[j].y) - 1;
    		if (arr[j].x==arr[k].x){
    			second2=min(arr[k].y,arr[j].y) + 1;
    			first2 = min(arr[k].x,arr[j].x) - 1;
    		}
    		else if (arr[j].y!=arr[k].y){
    			continue;
    		}
    		if (p.find({first1,second1})==p.end()){
    			ok=true;
    			ansx.push_back(first1);
    			ansy.push_back(second1);
    			ansxi.push_back(arr[j].index);
    			ansyi.push_back(arr[k].index);
    			unionset(j,k);
    			p.insert({ansx.back(),ansy.back()});
    			break;
    		}
    		if (p.find({first2,second1})==p.end()){
    			ok=true;
    			ansx.push_back(first2);
    			ansy.push_back(second1);
    			ansxi.push_back(arr[j].index);
    			ansyi.push_back(arr[k].index);
    			unionset(j,k);
    			p.insert({ansx.back(),ansy.back()});
    			break;
    		}
    		if (p.find({first1,second2})==p.end()){
    			ok=true;
    			ansx.push_back(first1);
    			ansy.push_back(second2);
    			ansxi.push_back(arr[j].index);
    			ansyi.push_back(arr[k].index);
    			unionset(j,k);
    			p.insert({ansx.back(),ansy.back()});
    			break;
    		}
    		if (p.find({first2,second2})==p.end()){
    			ok=true;
    			ansx.push_back(first2);
    			ansy.push_back(second2);
    			ansxi.push_back(arr[j].index);
    			unionset(j,k);
    			ansyi.push_back(arr[k].index);
    			p.insert({ansx.back(),ansy.back()});
    			break;
    		}
    		}
    	}
    	
    }
    if (siz[findsets(0)]!=n)return 0;
    	  build(ansxi,ansyi,ansx,ansy);
    	  return 1;
    }
    
    
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct
17 Correct 4 ms 8140 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 4 ms 8012 KB Output is correct
20 Correct 4 ms 8140 KB Output is correct
21 Correct 6 ms 8012 KB Output is correct
22 Correct 5 ms 8012 KB Output is correct
23 Correct 229 ms 33052 KB Output is correct
24 Incorrect 5 ms 8012 KB Solution announced impossible, but it is possible.
25 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct
17 Correct 4 ms 8140 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 4 ms 8012 KB Output is correct
20 Correct 4 ms 8140 KB Output is correct
21 Correct 6 ms 8012 KB Output is correct
22 Correct 5 ms 8012 KB Output is correct
23 Correct 229 ms 33052 KB Output is correct
24 Incorrect 5 ms 8012 KB Solution announced impossible, but it is possible.
25 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct
17 Correct 5 ms 8012 KB Output is correct
18 Correct 4 ms 8084 KB Output is correct
19 Correct 6 ms 8012 KB Output is correct
20 Execution timed out 3559 ms 14396 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct
17 Correct 231 ms 33404 KB Output is correct
18 Correct 229 ms 33436 KB Output is correct
19 Execution timed out 3572 ms 14440 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8140 KB Output is correct
2 Correct 4 ms 8012 KB Output is correct
3 Correct 4 ms 8012 KB Output is correct
4 Correct 4 ms 8140 KB Output is correct
5 Correct 4 ms 8012 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 4 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 72 ms 15896 KB Output is correct
10 Correct 10 ms 8984 KB Output is correct
11 Correct 36 ms 12232 KB Output is correct
12 Correct 13 ms 9312 KB Output is correct
13 Correct 15 ms 10056 KB Output is correct
14 Correct 6 ms 8140 KB Output is correct
15 Correct 5 ms 8140 KB Output is correct
16 Correct 72 ms 15928 KB Output is correct
17 Correct 4 ms 8140 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 4 ms 8012 KB Output is correct
20 Correct 4 ms 8140 KB Output is correct
21 Correct 6 ms 8012 KB Output is correct
22 Correct 5 ms 8012 KB Output is correct
23 Correct 229 ms 33052 KB Output is correct
24 Incorrect 5 ms 8012 KB Solution announced impossible, but it is possible.
25 Halted 0 ms 0 KB -