oj.uz

답안 #1053162

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1053162 2024-08-11T09:20:30 Z tolbi 분수 공원 (IOI21_parks) C++17
30 / 100
 812 ms 114968 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);
	}
	set<pair<int,int>> lmao;
	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.front()].size()<1 && lmao.find(que.front())!=lmao.end()) 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--;
		lmao.insert(pr);
		xa[it]=pr.first, ya[it]=pr.second;
		for (auto it2 : arr[it]){
			if (qu[it2].find(it)!=qu[it2].end()) 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 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 284 ms 31256 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 89 ms 12604 KB Output is correct
29 Correct 148 ms 18868 KB Output is correct
30 Correct 209 ms 25112 KB Output is correct
31 Correct 279 ms 31272 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 140 ms 16500 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 184 ms 23720 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 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 284 ms 31256 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 89 ms 12604 KB Output is correct
29 Correct 148 ms 18868 KB Output is correct
30 Correct 209 ms 25112 KB Output is correct
31 Correct 279 ms 31272 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 140 ms 16500 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 184 ms 23720 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 301 ms 32724 KB Output is correct
56 Correct 0 ms 348 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 1668 KB Output is correct
60 Correct 124 ms 16700 KB Output is correct
61 Correct 188 ms 22188 KB Output is correct
62 Correct 230 ms 27020 KB Output is correct
63 Correct 312 ms 32932 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 314 ms 35496 KB Output is correct
68 Correct 296 ms 35520 KB Output is correct
69 Correct 308 ms 35492 KB Output is correct
70 Correct 3 ms 856 KB Output is correct
71 Correct 6 ms 1368 KB Output is correct
72 Correct 126 ms 17236 KB Output is correct
73 Correct 211 ms 25764 KB Output is correct
74 Correct 335 ms 34212 KB Output is correct
75 Correct 325 ms 35496 KB Output is correct
76 Correct 285 ms 35492 KB Output is correct
77 Correct 4 ms 1116 KB Output is correct
78 Correct 7 ms 1628 KB Output is correct
79 Correct 129 ms 17148 KB Output is correct
80 Correct 216 ms 25780 KB Output is correct
81 Correct 315 ms 34212 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 KB Output is correct
17 Correct 0 ms 600 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 658 ms 96452 KB Output is correct
21 Incorrect 812 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 KB Output is correct
17 Incorrect 805 ms 114968 KB Tree (a[0], b[0]) = (3, 5) is not adjacent to edge between u[0]=148989 @(82420, 100002) and v[0]=0 @(82422, 100002)
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 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 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 120 ms 17828 KB Output is correct
10 Correct 6 ms 2396 KB Output is correct
11 Correct 37 ms 9944 KB Output is correct
12 Correct 9 ms 3416 KB Output is correct
13 Correct 27 ms 6624 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 120 ms 17900 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 284 ms 31256 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 89 ms 12604 KB Output is correct
29 Correct 148 ms 18868 KB Output is correct
30 Correct 209 ms 25112 KB Output is correct
31 Correct 279 ms 31272 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 0 ms 344 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 604 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 140 ms 16500 KB Output is correct
46 Correct 185 ms 23720 KB Output is correct
47 Correct 184 ms 23720 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 301 ms 32724 KB Output is correct
56 Correct 0 ms 348 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 1668 KB Output is correct
60 Correct 124 ms 16700 KB Output is correct
61 Correct 188 ms 22188 KB Output is correct
62 Correct 230 ms 27020 KB Output is correct
63 Correct 312 ms 32932 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 314 ms 35496 KB Output is correct
68 Correct 296 ms 35520 KB Output is correct
69 Correct 308 ms 35492 KB Output is correct
70 Correct 3 ms 856 KB Output is correct
71 Correct 6 ms 1368 KB Output is correct
72 Correct 126 ms 17236 KB Output is correct
73 Correct 211 ms 25764 KB Output is correct
74 Correct 335 ms 34212 KB Output is correct
75 Correct 325 ms 35496 KB Output is correct
76 Correct 285 ms 35492 KB Output is correct
77 Correct 4 ms 1116 KB Output is correct
78 Correct 7 ms 1628 KB Output is correct
79 Correct 129 ms 17148 KB Output is correct
80 Correct 216 ms 25780 KB Output is correct
81 Correct 315 ms 34212 KB Output is correct
82 Correct 0 ms 600 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 658 ms 96452 KB Output is correct
86 Incorrect 812 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 -