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Submission #1053155

# Submission time Handle Problem Language Result Execution time Memory
1053155 2024-08-11T09:15:54 Z tolbi Fountain Parks (IOI21_parks) C++17
30 / 100
 703 ms 221428 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
//void build(std::vector<int> u, std::vector<int> v, std::vector<int> a, std::vector<int> b);
struct DSU{
	vector<int> par;
	int tot;
	DSU(int n):tot(n){
		par.resize(n);
		iota(par.begin(), par.end(), 0);
	}
	int find(int node){
		if (par[node]==node) return node;
		return par[node]=find(par[node]);
	}
	bool merge(int a, int b){
		a=find(a);
		b=find(b);
		if (a!=b) tot--;
		else return false;
		par[a]=b;
		return true;
	}
};
int construct_roads(vector<int> x, vector<int> y) {
	bool subtask3 = true;
	int n = x.size();
	for (int i = 0; i < n; i++){
		if (x[i]<2 || x[i]>6) subtask3=false;
	}
	if (subtask3){
		map<pair<int,int>,int> mp;
		for (int i = 0; i < n; ++i)
		{
			mp[{x[i],y[i]}]=i;
		}
		DSU dsu(n);
		vector<int> u;
		vector<int> v;
		vector<int> xa;
		vector<int> ya;
		set<pair<int,int>> occupied;
		vector<int> lol;
		for (int i = 0; i < n; i++){
			if (mp.count({x[i],y[i]-2})){
				if (dsu.merge(i,mp[{x[i],y[i]-2}])){
					u.push_back(mp[{x[i],y[i]-2}]);
					v.push_back(i);
					ya.push_back(y[i]-1);
					if (x[i]==2) xa.push_back(x[i]-1);
					else if (x[i]==6) xa.push_back(x[i]+1);
					else {
						xa.push_back(-1);
						lol.push_back(x[i]);
					}
					if (xa.back()!=-1) occupied.insert({xa.back(),ya.back()});
				}
			}
		}
		for (int i = 0; i < n; ++i)
		{
			if (x[i]==6){
				if (mp.count({x[i]-2,y[i]})){
					if (dsu.merge(i,mp[{x[i]-2,y[i]}])){
						u.push_back(mp[{x[i]-2,y[i]}]);
						v.push_back(i);
						xa.push_back(x[i]-1);
						ya.push_back(y[i]-1);
						occupied.insert({xa.back(),ya.back()});
					}
				}
			}
		}
		for (int i = 0; i < n; ++i)
		{
			if (x[i]!=6){
				if (mp.count({x[i]-2,y[i]})){
					if (dsu.merge(i,mp[{x[i]-2,y[i]}])){
						u.push_back(mp[{x[i]-2,y[i]}]);
						v.push_back(i);
						xa.push_back(x[i]-1);
						if (occupied.find({x[i]+1,y[i]-1})==occupied.end()){
							ya.push_back(y[i]-1);
						}
						else ya.push_back(y[i]+1);
						occupied.insert({xa.back(),ya.back()});
					}
				}
			}
		}
		reverse(lol.begin(), lol.end());
		bool boolean=true;
		for (int i = 0; i < xa.size(); i++){
			if (xa[i]==-1){
				if (occupied.find({lol.back()+1,ya[i]})==occupied.end()){
					xa[i]=lol.back()+1;
				}
				else if (occupied.find({lol.back()-1,ya[i]})==occupied.end()){
					xa[i]=lol.back()-1;
				}
				else {
					boolean=false;
					break;
				}
				lol.pop_back();
			}
		}
		if (dsu.tot==1 && boolean) {
			return build(u,v,xa,ya),1;
		}
		return 0;
	}




	//subtasks 4..5
	DSU dsu(n);
	map<pair<int,int>, int>mp;
	for (int i = 0; i < n; ++i)
	{
		mp[{x[i],y[i]}]=i;
	}
	vector<int> u;
	vector<int> v;
	vector<int> xa(n-1,-1);
	vector<int> ya(n-1,-1);
	vector<set<pair<int,int>>> arr;
	map<pair<int,int>,set<int>> qu;
	for (int i = 0; i < n; ++i)
	{
		if (mp.count({x[i]-2,y[i]})){
			if (dsu.merge(mp[{x[i]-2,y[i]}],i)){
				u.push_back(mp[{x[i]-2,y[i]}]);
				v.push_back(i);
				arr.push_back(set<pair<int,int>>());
				arr.back().insert({x[i]-1,y[i]-1});
				arr.back().insert({x[i]-1,y[i]+1});
				qu[{x[i]-1,y[i]-1}].insert(u.size()-1);
				qu[{x[i]-1,y[i]+1}].insert(u.size()-1);
			}
		}
		if (mp.count({x[i],y[i]-2})){
			if (dsu.merge(mp[{x[i],y[i]-2}],i)){
				u.push_back(mp[{x[i],y[i]-2}]);
				v.push_back(i);
				arr.push_back(set<pair<int,int>>());
				arr.back().insert({x[i]-1,y[i]-1});
				arr.back().insert({x[i]+1,y[i]-1});
				qu[{x[i]-1,y[i]-1}].insert(u.size()-1);
				qu[{x[i]+1,y[i]-1}].insert(u.size()-1);
			}
		}
	}
	if (dsu.tot!=1) return 0;
	vector<pair<int,int>> iki;
	queue<pair<int,int>> que;
	int kal = n-1;
	for (auto it : qu){
		if (it.second.size()==1) que.push(it.first);
		else iki.push_back(it.first);
	}
	while (kal>0){
		if (!que.size()){
			while (iki.size() && qu[iki.back()].size()<2) iki.pop_back();
			if (iki.size()){
				auto it = qu[iki.back()].begin();
				arr[*it].erase(iki.back());
				qu[iki.back()].erase(it);
				que.push(iki.back());
				iki.pop_back();
			}
			else return 0;
		}
		while (que.size() && qu[que.back()].size()<1) que.pop();
		pair<int,int> pr = que.front();
		que.pop();
		//bu elemani baglicam kalanina bakarik
		int it = *qu[pr].begin();
		if (xa[it]!=-1) continue;
		kal--;
		xa[it]=pr.first, ya[it]=pr.second;
		for (auto it2 : arr[it]){
			qu[it2].erase(it);
			if (qu[it2].size()==1) {
				que.push(it2);
			}
		}
		while (arr[it].size()) arr[it].erase(arr[it].begin());
	}
	build(u,v,xa,ya);
	return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:93:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |   for (int i = 0; i < xa.size(); i++){
      |                   ~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 306 ms 31332 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 860 KB Output is correct
28 Correct 94 ms 12664 KB Output is correct
29 Correct 146 ms 18868 KB Output is correct
30 Correct 211 ms 25252 KB Output is correct
31 Correct 276 ms 31396 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 348 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 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 716 KB Output is correct
45 Correct 116 ms 16420 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 182 ms 23792 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 306 ms 31332 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 860 KB Output is correct
28 Correct 94 ms 12664 KB Output is correct
29 Correct 146 ms 18868 KB Output is correct
30 Correct 211 ms 25252 KB Output is correct
31 Correct 276 ms 31396 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 348 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 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 716 KB Output is correct
45 Correct 116 ms 16420 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 182 ms 23792 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 293 ms 32932 KB Output is correct
56 Correct 1 ms 344 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 5 ms 1372 KB Output is correct
59 Correct 8 ms 1628 KB Output is correct
60 Correct 125 ms 16628 KB Output is correct
61 Correct 177 ms 22200 KB Output is correct
62 Correct 242 ms 27044 KB Output is correct
63 Correct 297 ms 32812 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 283 ms 35564 KB Output is correct
68 Correct 296 ms 35492 KB Output is correct
69 Correct 277 ms 35272 KB Output is correct
70 Correct 3 ms 860 KB Output is correct
71 Correct 6 ms 1448 KB Output is correct
72 Correct 139 ms 17260 KB Output is correct
73 Correct 221 ms 25648 KB Output is correct
74 Correct 304 ms 34216 KB Output is correct
75 Correct 327 ms 35496 KB Output is correct
76 Correct 280 ms 35496 KB Output is correct
77 Correct 4 ms 1112 KB Output is correct
78 Correct 7 ms 1756 KB Output is correct
79 Correct 132 ms 17324 KB Output is correct
80 Correct 210 ms 25760 KB Output is correct
81 Correct 307 ms 34216 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 597 ms 95344 KB Output is correct
21 Incorrect 703 ms 95216 KB Tree (a[0], b[0]) = (5, 7) is not adjacent to edge between u[0]=178618 @(56858, 56862) and v[0]=0 @(56858, 56864)
22 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct
17 Runtime error 585 ms 221428 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 1 ms 348 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 123 ms 17816 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9924 KB Output is correct
12 Correct 9 ms 3160 KB Output is correct
13 Correct 29 ms 6864 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 121 ms 17832 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 306 ms 31332 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 860 KB Output is correct
28 Correct 94 ms 12664 KB Output is correct
29 Correct 146 ms 18868 KB Output is correct
30 Correct 211 ms 25252 KB Output is correct
31 Correct 276 ms 31396 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 348 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 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 716 KB Output is correct
45 Correct 116 ms 16420 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 182 ms 23792 KB Output is correct
48 Correct 0 ms 344 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 293 ms 32932 KB Output is correct
56 Correct 1 ms 344 KB Output is correct
57 Correct 1 ms 604 KB Output is correct
58 Correct 5 ms 1372 KB Output is correct
59 Correct 8 ms 1628 KB Output is correct
60 Correct 125 ms 16628 KB Output is correct
61 Correct 177 ms 22200 KB Output is correct
62 Correct 242 ms 27044 KB Output is correct
63 Correct 297 ms 32812 KB Output is correct
64 Correct 0 ms 344 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 283 ms 35564 KB Output is correct
68 Correct 296 ms 35492 KB Output is correct
69 Correct 277 ms 35272 KB Output is correct
70 Correct 3 ms 860 KB Output is correct
71 Correct 6 ms 1448 KB Output is correct
72 Correct 139 ms 17260 KB Output is correct
73 Correct 221 ms 25648 KB Output is correct
74 Correct 304 ms 34216 KB Output is correct
75 Correct 327 ms 35496 KB Output is correct
76 Correct 280 ms 35496 KB Output is correct
77 Correct 4 ms 1112 KB Output is correct
78 Correct 7 ms 1756 KB Output is correct
79 Correct 132 ms 17324 KB Output is correct
80 Correct 210 ms 25760 KB Output is correct
81 Correct 307 ms 34216 KB Output is correct
82 Correct 1 ms 344 KB Output is correct
83 Correct 0 ms 344 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 597 ms 95344 KB Output is correct
86 Incorrect 703 ms 95216 KB Tree (a[0], b[0]) = (5, 7) is not adjacent to edge between u[0]=178618 @(56858, 56862) and v[0]=0 @(56858, 56864)
87 Halted 0 ms 0 KB -