oj.uz

Submission #831624

# Submission time Handle Problem Language Result Execution time Memory
831624 2023-08-20T11:31:32 Z andrey27_sm Fountain Parks (IOI21_parks) C++17
5 / 100
 227 ms 45948 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
vector<pair<int,int>> cons[200001];
int mask_l[200001];
vector<int> u;
vector<int> v;
vector<int> a;
vector<int> b;
struct dsu{
	int sz = 0;
	vector<int> pr;
	int p(int v){
		if(pr[v] == v) return v;
		return pr[v] = p(pr[v]);
	}
	void un(int u,int v){
		u = p(u);
		v = p(v);
		if(u == v) return;
		pr[u] = v;
		sz++;
	}
} D;
struct edge{
	int x;
	int y;
	int type; // 0 - vert, 1 - hor;
	int a;
	int b;
};
int construct_roads(vector<int> x, vector<int> y) {
	int n = x.size();
	D.pr.resize(n);
	for (int i = 0; i < n; ++i)
	{
		D.pr[i] = i;
	}
	vector<edge> E;
	vector<pair<int,pair<int,int>>> x_d;
	vector<pair<int,pair<int,int>>> y_d;
	for (int i = 0; i < n; ++i)
	{
	 	x_d.push_back({x[i],{y[i],i}});
	 	y_d.push_back({y[i],{x[i],i}});
	} 
	sort(x_d.begin(), x_d.end());
	sort(y_d.begin(), y_d.end());
	for (int i = 1; i < n; ++i)
	{
		if(x_d[i].first == x_d[i-1].first and x_d[i].second.first-2 == x_d[i-1].second.first){
			E.push_back({x_d[i-1].first,x_d[i-1].second.first,0,x_d[i-1].second.second,x_d[i].second.second});
			D.un(x_d[i-1].second.second,x_d[i].second.second);
		}
	}
	for (int i = 1; i < n; ++i)
	{
		if(y_d[i].first == y_d[i-1].first and y_d[i].second.first-2 == y_d[i-1].second.first){
			E.push_back({y_d[i-1].second.first,y_d[i-1].first,1,y_d[i-1].second.second,y_d[i].second.second});
			D.un(y_d[i-1].second.second,y_d[i].second.second);
		}
	}
	if(D.sz != n-1) return 0;
	set<pair<int,int>> lines;
	set<pair<int,int>> points;
	sort(E.begin(),E.end(),[](auto a,auto b){
		if(a.x != b.x) return a.x < b.x;
		if(a.type != b.type) return a.type < b.type;
		return a.y < b.y;
	});
	for (int i = 0; i < E.size(); ++i)
	{
		if(E[i].type == 0) lines.insert({E[i].x,E[i].y});
	}
	for (int i = 0; i < E.size(); ++i)
	{
		//cout << E[i].x << " " << E[i].y << "   --\n";
		if(E[i].type == 0){
			if(points.count({E[i].x-1,E[i].y+1}) == 0){
				u.push_back(E[i].a);
				v.push_back(E[i].b);
				a.push_back(E[i].x-1);
				b.push_back(E[i].y+1);
				points.insert({E[i].x-1,E[i].y+1});
			}
			else if(points.count({E[i].x+1,E[i].y+1}) == 0){				
				u.push_back(E[i].a);
				v.push_back(E[i].b);
				a.push_back(E[i].x+1);
				b.push_back(E[i].y+1);
				points.insert({E[i].x+1,E[i].y+1});
			}
			else return 0;
		}
		else{
			int top = 0;
			if(points.count({E[i].x+1,E[i].y-1})) top = 1;
			else if(points.count({E[i].x+1,E[i].y+1})) top = 2;
			if(top == 0 and lines.count({E[i].x+2,E[i].y-2})) top = 2;
			if(top == 0 and lines.count({E[i].x+2,E[i].y})) top = 1;
			if(top%2 == 0){
				u.push_back(E[i].a);
				v.push_back(E[i].b);
				a.push_back(E[i].x+1);
				b.push_back(E[i].y-1);
				points.insert({E[i].x+1,E[i].y-1});
			}
			else{				
				u.push_back(E[i].a);
				v.push_back(E[i].b);
				a.push_back(E[i].x+1);
				b.push_back(E[i].y+1);
				points.insert({E[i].x+1,E[i].y+1});
			}
		}
	}
	if(points.size() != n-1) return 0;
	build(u,v,a,b);
	return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:71:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |  for (int i = 0; i < E.size(); ++i)
      |                  ~~^~~~~~~~~~
parks.cpp:75:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |  for (int i = 0; i < E.size(); ++i)
      |                  ~~^~~~~~~~~~
parks.cpp:117:19: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  117 |  if(points.size() != n-1) return 0;
      |     ~~~~~~~~~~~~~~^~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct
17 Incorrect 2 ms 4948 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct
17 Incorrect 2 ms 4948 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 227 ms 41292 KB Output is correct
21 Correct 213 ms 41228 KB Output is correct
22 Correct 218 ms 41224 KB Output is correct
23 Correct 175 ms 35088 KB Output is correct
24 Correct 72 ms 13752 KB Output is correct
25 Correct 76 ms 21288 KB Output is correct
26 Correct 75 ms 21308 KB Output is correct
27 Correct 216 ms 45948 KB Output is correct
28 Correct 216 ms 45840 KB Output is correct
29 Correct 213 ms 36532 KB Output is correct
30 Correct 216 ms 36532 KB Output is correct
31 Correct 2 ms 4948 KB Output is correct
32 Incorrect 13 ms 7008 KB Solution announced impossible, but it is possible.
33 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct
17 Incorrect 163 ms 35636 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 99 ms 25476 KB Output is correct
10 Correct 9 ms 7056 KB Output is correct
11 Correct 48 ms 15988 KB Output is correct
12 Correct 13 ms 7992 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 2 ms 5076 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 99 ms 25452 KB Output is correct
17 Incorrect 2 ms 4948 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -