oj.uz

Submission #436602

# Submission time Handle Problem Language Result Execution time Memory
436602 2021-06-24T16:45:52 Z Apiram Fountain Parks (IOI21_parks) C++17
5 / 100
 3500 ms 32996 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;
    });
    stack<int>check;
    	int i =1;
    	for (;i<n;++i){
    		if (arr[i].x!=2)break;
    		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);
    		unionset(i-1,i);
    		p.insert({ansx.back(),ansy.back()});
    		}
    		else {
    			check.push(i);
    		}
    	}
    		int j =i;
    
    	for (;i<n;++i){
    		if (arr[i-1].x==2)continue;
    		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);
    		unionset(i-1,i);
    		p.insert({ansx.back(),ansy.back()});
    		}
    		else {
    			check.push(i);
    		}
    	}
    
    	bool ok=false;
    for (i = j;i<n;++i){
    	if (dist(arr[j-1],arr[i])){
    		int first1=min(arr[i].x,arr[j-1].x) + 1;
    		int first2=min(arr[i].x,arr[j-1].x) + 1;
    		int second1=min(arr[i].y,arr[j-1].y) + 1;
    		int second2 = min(arr[i].y,arr[j-1].y) - 1;
    		if (p.find({first1,second1})==p.end()){
    			ok=true;
    			ansx.push_back(first1);
    			ansy.push_back(second1);
    			ansxi.push_back(arr[j-1].index);
    			ansyi.push_back(arr[i].index);
    			unionset(j-1,i);
    			break;
    		}
    		if (p.find({first2,second1})==p.end()){
    			ok=true;
    			ansx.push_back(first2);
    			ansy.push_back(second1);
    			ansxi.push_back(arr[j-1].index);
    			ansyi.push_back(arr[i].index);
    			unionset(j-1,i);
    			break;
    		}
    		if (p.find({first1,second2})==p.end()){
    			ok=true;
    			ansx.push_back(first1);
    			ansy.push_back(second2);
    			ansxi.push_back(arr[j-1].index);
    			ansyi.push_back(arr[i].index);
    			unionset(j-1,i);
    			break;
    		}
    		if (p.find({first2,second2})==p.end()){
    			ok=true;
    			ansx.push_back(first2);
    			ansy.push_back(second2);
    			ansxi.push_back(arr[j-1].index);
    			unionset(j-1,i);
    			ansyi.push_back(arr[i].index);
    			break;
    		}
    		
    		
    	}
    }
    while(!check.empty()){
    	int k = check.top();
    	check.pop();
    	for (int j =0;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 (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);
    			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);
    			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);
    			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);
    			break;
    		}
    		}
    	}
    	
    }
    if (siz[findsets(0)]!=n)return 0;
    	  build(ansxi,ansyi,ansx,ansy);
    	  return 1;
    }
    
    
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:99:11: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
   99 |      bool ok=false;
      |           ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct
17 Correct 5 ms 8012 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8012 KB Output is correct
21 Correct 5 ms 8012 KB Output is correct
22 Correct 6 ms 8012 KB Output is correct
23 Correct 196 ms 32996 KB Output is correct
24 Incorrect 4 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 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct
17 Correct 5 ms 8012 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8012 KB Output is correct
21 Correct 5 ms 8012 KB Output is correct
22 Correct 6 ms 8012 KB Output is correct
23 Correct 196 ms 32996 KB Output is correct
24 Incorrect 4 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 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct
17 Incorrect 5 ms 8132 KB Edge between 2 and 0 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 4 ms 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct
17 Execution timed out 3580 ms 20452 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8012 KB Output is correct
2 Correct 5 ms 8012 KB Output is correct
3 Correct 4 ms 8140 KB Output is correct
4 Correct 5 ms 8140 KB Output is correct
5 Correct 5 ms 8140 KB Output is correct
6 Correct 4 ms 8012 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 4 ms 8140 KB Output is correct
9 Correct 79 ms 15940 KB Output is correct
10 Correct 10 ms 8924 KB Output is correct
11 Correct 37 ms 12232 KB Output is correct
12 Correct 13 ms 9332 KB Output is correct
13 Correct 17 ms 10056 KB Output is correct
14 Correct 5 ms 8140 KB Output is correct
15 Correct 5 ms 8132 KB Output is correct
16 Correct 75 ms 15948 KB Output is correct
17 Correct 5 ms 8012 KB Output is correct
18 Correct 5 ms 8012 KB Output is correct
19 Correct 6 ms 8140 KB Output is correct
20 Correct 6 ms 8012 KB Output is correct
21 Correct 5 ms 8012 KB Output is correct
22 Correct 6 ms 8012 KB Output is correct
23 Correct 196 ms 32996 KB Output is correct
24 Incorrect 4 ms 8012 KB Solution announced impossible, but it is possible.
25 Halted 0 ms 0 KB -