oj.uz

Submission #831676

# Submission time Handle Problem Language Result Execution time Memory
831676 2023-08-20T12:13:49 Z andrey27_sm Fountain Parks (IOI21_parks) C++17
5 / 100
 259 ms 46212 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]);
	}
	bool un(int u,int v){
		u = p(u);
		v = p(v);
		if(u == v) return 0 ;
		pr[u] = v;
		sz++;
		return 1;
	}
} 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){
			D.un(x_d[i-1].second.second,x_d[i].second.second);
			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});
		}
	}
	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){
			D.un(y_d[i-1].second.second,y_d[i].second.second);
			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});
		}
	}
	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});
	}
	assert(E.size() <= n-1);
	for (int i = 0; i < E.size(); ++i)
	{
		//cout << E[i].x << " " << E[i].y << " " << E[i].type << " " << E[i].a << " " << E[i].b << "   --\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}) and points.count({E[i].x+1,E[i].y+1})) return 0;
			if(top == 0 and ((lines.count({E[i].x+2,E[i].y-2}) and lines.count({E[i].x+2,E[i].y})) or 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 and 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{
				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:72:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |  for (int i = 0; i < E.size(); ++i)
      |                  ~~^~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from parks.cpp:2:
parks.cpp:76:18: warning: comparison of integer expressions of different signedness: 'std::vector<edge>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   76 |  assert(E.size() <= n-1);
      |         ~~~~~~~~~^~~~~~
parks.cpp:77:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |  for (int i = 0; i < E.size(); ++i)
      |                  ~~^~~~~~~~~~

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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 KB Output is correct
17 Runtime error 6 ms 9940 KB Execution killed with signal 6
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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 KB Output is correct
17 Runtime error 6 ms 9940 KB Execution killed with signal 6
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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 259 ms 41200 KB Output is correct
21 Correct 241 ms 41252 KB Output is correct
22 Correct 252 ms 41260 KB Output is correct
23 Correct 186 ms 34996 KB Output is correct
24 Correct 78 ms 13756 KB Output is correct
25 Correct 77 ms 21256 KB Output is correct
26 Correct 77 ms 21248 KB Output is correct
27 Correct 217 ms 45888 KB Output is correct
28 Correct 220 ms 45832 KB Output is correct
29 Correct 219 ms 36520 KB Output is correct
30 Correct 211 ms 36532 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 17 ms 7568 KB Output is correct
33 Correct 33 ms 9412 KB Output is correct
34 Correct 228 ms 41224 KB Output is correct
35 Correct 6 ms 5804 KB Output is correct
36 Correct 21 ms 9028 KB Output is correct
37 Correct 48 ms 13056 KB Output is correct
38 Incorrect 51 ms 13208 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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 KB Output is correct
17 Runtime error 135 ms 46212 KB Execution killed with signal 6
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 4948 KB Output is correct
3 Correct 3 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 102 ms 25444 KB Output is correct
10 Correct 10 ms 7068 KB Output is correct
11 Correct 50 ms 16004 KB Output is correct
12 Correct 14 ms 7952 KB Output is correct
13 Correct 12 ms 8808 KB Output is correct
14 Correct 3 ms 5012 KB Output is correct
15 Correct 3 ms 5076 KB Output is correct
16 Correct 109 ms 25404 KB Output is correct
17 Runtime error 6 ms 9940 KB Execution killed with signal 6
18 Halted 0 ms 0 KB -