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Submission #1039825

# Submission time Handle Problem Language Result Execution time Memory
1039825 2024-07-31T09:55:10 Z vjudge1 Fountain Parks (IOI21_parks) C++17
15 / 100
 222 ms 39592 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;

struct dsu {
	vector<int> e;
	int cc;
	dsu(int n) {
		cc=n;
		e=vector<int> (n, -1);
	}
	int get(int a) {
		if(e[a] < 0)return a;
		return e[a] = get(e[a]);
	}
	bool unite(int a, int b) {
		a=get(a), b=get(b);
		if(a==b)return false;
		cc--;
		if(-e[a] > -e[b])swap(a, b);
		e[b]+=e[a];
		e[a]=b;
		return true;
	}
};
int construct_roads(std::vector<int> x, std::vector<int> y) {
	vector<vector<int>> p(7);
	int n = x.size();
	map<pair<int,int>, int> mp;
	for(int i = 0;i<n;i++) {
		mp[{x[i], y[i]}]=i;
		p[x[i]].push_back(i);
	}
	dsu d(n);
	vector<int> u, v;
	for(int i= 0;i<7;i++) {
		sort(p[i].begin(), p[i].end(), [&](int a, int b) {
					return y[a] < y[b];
				});
	}
	{
		int i = 6;
		for(int j = 1;j<(int)p[i].size();j++) {
			if(y[p[i][j]] == y[p[i][j-1]] + 2){
				if(d.unite(p[i][j], p[i][j-1])) {
					v.push_back(p[i][j]);
					u.push_back(p[i][j-1]);
				}
			}
		}
	}
	{
		int i = 2;
		for(int j = 1;j<(int)p[i].size();j++) {
			if(y[p[i][j]] == y[p[i][j-1]] + 2){
				if(d.unite(p[i][j], p[i][j-1])) {
					v.push_back(p[i][j]);
					u.push_back(p[i][j-1]);
				}
			}
		}
	}
	{
		int i = 4;
		for(int j = 1;j<(int)p[i].size();j++) {
			if(y[p[i][j]] == y[p[i][j-1]] + 2){
				if(d.unite(p[i][j], p[i][j-1])) {
					v.push_back(p[i][j]);
					u.push_back(p[i][j-1]);
				}
			}
		}
	}
	{
		for(int j:p[4]) {
			if(mp.find({x[j]-2, y[j]}) != mp.end() and d.unite(j, mp[{x[j]-2, y[j]}])) {
				u.push_back(mp[{x[j]-2, y[j]}]);
				v.push_back(j);
			}
		}
		for(int j:p[4]) {
			if(mp.find({x[j]+2, y[j]}) != mp.end() and d.unite(j, mp[{x[j]+2, y[j]}])) {
				v.push_back(mp[{x[j]+2, y[j]}]);
				u.push_back(j);
			}
		}
	}
//	for(int i = 0;i<(int)v.size();i++) {
//		cout << u[i] << " "<< v[i] << endl;
//	}
	vector<int> a, b;
	if(d.cc != 1)return 0;
	map<pair<int,int>, bool> used;
	for(int j = 0;j<n-1;j++) {
		if(x[u[j]] == x[v[j]]) {
			if(x[u[j]] == 2) {
				a.push_back(x[u[j]]-1);
				b.push_back(y[u[j]]+1);
				used[{x[u[j]]-1,y[u[j]]+1}]=1;
			}
			else if(x[u[j]] == 6) {
				a.push_back(x[u[j]]+1);
				b.push_back(y[u[j]]+1);
				used[{x[u[j]]+1,y[u[j]]+1}]=1;
			}
			else if(x[u[j]] == 4)  {
				a.push_back(-1);
				b.push_back(-1);
			}
		}
		else if(x[u[j]] == 2) {
			a.push_back(x[u[j]]+1);
			b.push_back(y[u[j]]+1);
			used[{x[u[j]]+1, y[u[j]]+1}]=1;
		} else if(x[u[j]] == 4) {
			a.push_back(x[u[j]]+1);
			b.push_back(y[u[j]]-1);
			used[{x[u[j]]+1, y[u[j]]-1}]=1;
		}
	}
	for(int j = 0;j<n-1;j++) {
		if(a[j] == -1) {
			if(!used[{x[u[j]]-1, y[u[j]]+1}]) {
				a[j] = x[u[j]]-1;
				b[j] = y[u[j]]+1;
				used[{x[u[j]]-1, y[u[j]]+1}]=1;
			}
			else if(!used[{x[u[j]]+1, y[u[j]]+1}]) {
				a[j] = x[u[j]]+1;
				b[j] = y[u[j]]+1;
				used[{x[u[j]]+1, y[u[j]]+1}]=1;
			}
			else {
				return 0;
			}
		}
	}
	build(u, v, a, b);
	return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 39488 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 2 ms 760 KB Output is correct
28 Correct 74 ms 15940 KB Output is correct
29 Correct 119 ms 23892 KB Output is correct
30 Correct 152 ms 31616 KB Output is correct
31 Correct 212 ms 39592 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 356 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 600 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 95 ms 20012 KB Output is correct
46 Correct 153 ms 28772 KB Output is correct
47 Correct 151 ms 28776 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 39488 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 2 ms 760 KB Output is correct
28 Correct 74 ms 15940 KB Output is correct
29 Correct 119 ms 23892 KB Output is correct
30 Correct 152 ms 31616 KB Output is correct
31 Correct 212 ms 39592 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 356 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 600 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 95 ms 20012 KB Output is correct
46 Correct 153 ms 28772 KB Output is correct
47 Correct 151 ms 28776 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Incorrect 0 ms 348 KB Solution announced impossible, but it is possible.
52 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct
17 Runtime error 0 ms 348 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct
17 Runtime error 25 ms 6748 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 93 ms 20008 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 33 ms 10896 KB Output is correct
12 Correct 8 ms 3416 KB Output is correct
13 Correct 12 ms 4780 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 92 ms 20088 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 39488 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 600 KB Output is correct
27 Correct 2 ms 760 KB Output is correct
28 Correct 74 ms 15940 KB Output is correct
29 Correct 119 ms 23892 KB Output is correct
30 Correct 152 ms 31616 KB Output is correct
31 Correct 212 ms 39592 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 356 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 600 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 95 ms 20012 KB Output is correct
46 Correct 153 ms 28772 KB Output is correct
47 Correct 151 ms 28776 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Incorrect 0 ms 348 KB Solution announced impossible, but it is possible.
52 Halted 0 ms 0 KB -