oj.uz

Submission #831602

# Submission time Handle Problem Language Result Execution time Memory
831602 2023-08-20T11:13:07 Z andrey27_sm Fountain Parks (IOI21_parks) C++17
5 / 100
 246 ms 47484 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})){
				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});
			}
		}
		else{
			int top = 0;
			if(points.count({E[i].x+1,E[i].y-1})) top = 1;
			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})) top = 2;
			if(top == 0 and lines.count({E[i].x+2,E[i].y-2})) 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:116:19: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  116 |  if(points.size() != n-1) return 0;
      |     ~~~~~~~~~~~~~~^~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct
17 Incorrect 3 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 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct
17 Incorrect 3 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 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct
17 Correct 3 ms 5076 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 235 ms 43792 KB Output is correct
21 Correct 235 ms 43588 KB Output is correct
22 Correct 229 ms 43580 KB Output is correct
23 Correct 174 ms 36760 KB Output is correct
24 Correct 75 ms 15404 KB Output is correct
25 Correct 78 ms 22936 KB Output is correct
26 Correct 82 ms 22912 KB Output is correct
27 Correct 221 ms 47448 KB Output is correct
28 Correct 221 ms 47484 KB Output is correct
29 Correct 226 ms 38132 KB Output is correct
30 Correct 216 ms 38184 KB Output is correct
31 Correct 4 ms 4948 KB Output is correct
32 Correct 18 ms 7728 KB Output is correct
33 Correct 41 ms 10688 KB Output is correct
34 Correct 246 ms 43812 KB Output is correct
35 Correct 6 ms 5940 KB Output is correct
36 Correct 23 ms 9588 KB Output is correct
37 Correct 42 ms 14312 KB Output is correct
38 Incorrect 67 ms 18224 KB Solution announced impossible, but it is possible.
39 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct
17 Incorrect 177 ms 37264 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 3 ms 4948 KB Output is correct
2 Correct 2 ms 5000 KB Output is correct
3 Correct 2 ms 4936 KB Output is correct
4 Correct 3 ms 5076 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4944 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 102 ms 26316 KB Output is correct
10 Correct 10 ms 7056 KB Output is correct
11 Correct 47 ms 16392 KB Output is correct
12 Correct 18 ms 8144 KB Output is correct
13 Correct 13 ms 9156 KB Output is correct
14 Correct 3 ms 5004 KB Output is correct
15 Correct 3 ms 5132 KB Output is correct
16 Correct 99 ms 26260 KB Output is correct
17 Incorrect 3 ms 4948 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -