답안 #1020758

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1020758	2024-07-12T09:27:47 Z	Unforgettablepl	Reconstruction Project (JOI22_reconstruction)	C++17	42 / 100	5000 ms	5816 KB

reconstruction

#pragma GCC optimize("Ofast","unroll-loops")
#include <bits/stdc++.h>
using namespace std;

#define int long long

const int INF = 1e15;

struct UFDS{
	vector<int> p,siz;
	UFDS(int n):p(n+1),siz(n+1,1){iota(p.begin(),p.end(),0);}
	int findRoot(int x){
		return p[x]==x ? x : p[x]=findRoot(p[x]);
	}
	bool unite(int a,int b){
		a = findRoot(a);
		b = findRoot(b);
		if(a==b)return false;
		if(siz[a]<siz[b])swap(a,b);
		siz[a]+=siz[b];
		p[b]=a;
		return true;
	}
};

int32_t main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	int n,m;
	cin >> n >> m;
	vector<pair<int,pair<int,int>>> edges(m);
	for(auto&[a,b]:edges)cin>>b.first>>b.second>>a;
	sort(edges.begin(),edges.end());
	vector<set<pair<int,int>>> adj;
	vector<int> replaces_front(m,-1);
	{
		// Calculation from the front
		adj = vector<set<pair<int,int>>>(n+1);
		int tar;
		function<pair<bool,int>(int,int)> dfs = [&](int x,int p){
			if(x==tar)return make_pair(true,(int)1e15);
			for(auto[v,i]:adj[x])if(v!=p){
				auto res = dfs(v,x);
				if(res.first)return make_pair(true,min(res.second,i));
			}
			return make_pair(false,(int)0);
		};
		for(int i=0;i<m;i++){
			tar = edges[i].second.second;
			auto res = dfs(edges[i].second.first,-1);
			if(res.first){
				adj[edges[res.second].second.first].erase({edges[res.second].second.second,res.second});
				adj[edges[res.second].second.second].erase({edges[res.second].second.first,res.second});
				replaces_front[i] = res.second;
			}
			adj[edges[i].second.first].insert({edges[i].second.second,i});
			adj[edges[i].second.second].insert({edges[i].second.first,i});
		}
	}
	vector<int> replaces_back(m,-1);
	{
		// Calculation from the back
		adj = vector<set<pair<int,int>>>(n+1);
		int tar;
		function<pair<bool,int>(int,int)> dfs = [&](int x,int p){
			if(x==tar)return make_pair(true,(int)-1);
			for(auto[v,i]:adj[x])if(v!=p){
				auto res = dfs(v,x);
				if(res.first)return make_pair(true,max(res.second,i));
			}
			return make_pair(false,(int)0);
		};
		for(int i=m-1;i>=0;i--){
			tar = edges[i].second.second;
			auto res = dfs(edges[i].second.first,-1);
			if(res.first){
				adj[edges[res.second].second.first].erase({edges[res.second].second.second,res.second});
				adj[edges[res.second].second.second].erase({edges[res.second].second.first,res.second});
				replaces_back[i] = res.second;
			}
			adj[edges[i].second.first].insert({edges[i].second.second,i});
			adj[edges[i].second.second].insert({edges[i].second.first,i});
		}
	}
	set<int> curr_left;
	set<int> curr_right;
	for(auto&i:adj)for(auto[a,b]:i)curr_right.insert(b);
	auto solve = [&](int x){
		vector<pair<int,int>> curredges;
		for(int i:curr_left){
			curredges.emplace_back(abs(edges[i].first-x),i);
		}
		for(int i:curr_right){
			curredges.emplace_back(abs(edges[i].first-x),i);
		}
		sort(curredges.begin(),curredges.end());
		int ans = 0;
		UFDS dsu(n);
		for(auto[c,i]:curredges){
			if(dsu.unite(edges[i].second.first,edges[i].second.second))ans+=c;
		}
		return ans;
	};
	int iter = 0;
	int q;
	cin >> q;
	for(int i=1;i<=q;i++){
		int query;
		cin >> query;
		while(iter!=m and edges[iter].first<query){
			curr_right.erase(iter);
			if(replaces_back[iter]!=-1){
				curr_right.insert(replaces_back[iter]);
			}
			curr_left.insert(iter);
			if(replaces_front[iter]!=-1){
				curr_left.erase(replaces_front[iter]);
			}
			iter++;
		}
		cout << solve(query) << '\n';
	}
}

Subtask #1
3.0 / 3.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	344 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	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	0 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	344 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	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	0 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	828 ms	4348 KB	Output is correct
21	Correct	403 ms	4436 KB	Output is correct
22	Correct	615 ms	4440 KB	Output is correct
23	Correct	623 ms	4692 KB	Output is correct
24	Correct	715 ms	4432 KB	Output is correct
25	Correct	804 ms	4452 KB	Output is correct
26	Correct	841 ms	4344 KB	Output is correct
27	Correct	839 ms	4432 KB	Output is correct
28	Correct	857 ms	4476 KB	Output is correct
29	Correct	640 ms	4528 KB	Output is correct
30	Correct	825 ms	4428 KB	Output is correct
31	Correct	831 ms	4440 KB	Output is correct
32	Correct	840 ms	4436 KB	Output is correct
33	Correct	841 ms	4436 KB	Output is correct
34	Correct	392 ms	4344 KB	Output is correct
35	Correct	813 ms	4432 KB	Output is correct

Subtask #3
0 / 7.0

#	결과	실행 시간	메모리	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	Execution timed out	5089 ms	5816 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #4
0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	344 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	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	0 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Execution timed out	5082 ms	5072 KB	Time limit exceeded
21	Halted	0 ms	0 KB	-

Subtask #5
35.0 / 35.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	344 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	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	0 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	828 ms	4348 KB	Output is correct
21	Correct	403 ms	4436 KB	Output is correct
22	Correct	615 ms	4440 KB	Output is correct
23	Correct	623 ms	4692 KB	Output is correct
24	Correct	715 ms	4432 KB	Output is correct
25	Correct	804 ms	4452 KB	Output is correct
26	Correct	841 ms	4344 KB	Output is correct
27	Correct	839 ms	4432 KB	Output is correct
28	Correct	857 ms	4476 KB	Output is correct
29	Correct	640 ms	4528 KB	Output is correct
30	Correct	825 ms	4428 KB	Output is correct
31	Correct	831 ms	4440 KB	Output is correct
32	Correct	840 ms	4436 KB	Output is correct
33	Correct	841 ms	4436 KB	Output is correct
34	Correct	392 ms	4344 KB	Output is correct
35	Correct	813 ms	4432 KB	Output is correct
36	Correct	1791 ms	4728 KB	Output is correct
37	Correct	1193 ms	4688 KB	Output is correct
38	Correct	1527 ms	4688 KB	Output is correct
39	Correct	1674 ms	4688 KB	Output is correct
40	Correct	1678 ms	4692 KB	Output is correct
41	Correct	1747 ms	4688 KB	Output is correct
42	Correct	1736 ms	4648 KB	Output is correct
43	Correct	1787 ms	4684 KB	Output is correct
44	Correct	1390 ms	4688 KB	Output is correct
45	Correct	1051 ms	4688 KB	Output is correct
46	Correct	1738 ms	4696 KB	Output is correct
47	Correct	1842 ms	4692 KB	Output is correct
48	Correct	1841 ms	4692 KB	Output is correct
49	Correct	1717 ms	4588 KB	Output is correct
50	Correct	721 ms	4688 KB	Output is correct
51	Correct	1376 ms	4692 KB	Output is correct

Subtask #6
0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	344 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	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	0 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	828 ms	4348 KB	Output is correct
21	Correct	403 ms	4436 KB	Output is correct
22	Correct	615 ms	4440 KB	Output is correct
23	Correct	623 ms	4692 KB	Output is correct
24	Correct	715 ms	4432 KB	Output is correct
25	Correct	804 ms	4452 KB	Output is correct
26	Correct	841 ms	4344 KB	Output is correct
27	Correct	839 ms	4432 KB	Output is correct
28	Correct	857 ms	4476 KB	Output is correct
29	Correct	640 ms	4528 KB	Output is correct
30	Correct	825 ms	4428 KB	Output is correct
31	Correct	831 ms	4440 KB	Output is correct
32	Correct	840 ms	4436 KB	Output is correct
33	Correct	841 ms	4436 KB	Output is correct
34	Correct	392 ms	4344 KB	Output is correct
35	Correct	813 ms	4432 KB	Output is correct
36	Correct	1 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	Execution timed out	5089 ms	5816 KB	Time limit exceeded
40	Halted	0 ms	0 KB	-

답안 #1020758

Compilation message

Subtask #1 3.0 / 3.0

Subtask #2 4.0 / 4.0

Subtask #3 0 / 7.0

Subtask #4 0 / 28.0

Subtask #5 35.0 / 35.0

Subtask #6 0 / 23.0

Subtask #1
3.0 / 3.0

Subtask #2
4.0 / 4.0

Subtask #3
0 / 7.0

Subtask #4
0 / 28.0

Subtask #5
35.0 / 35.0

Subtask #6
0 / 23.0