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Submission #713133

# Submission time Handle Problem Language Result Execution time Memory
713133 2023-03-21T08:29:24 Z amirhoseinfar1385 Evacuation plan (IZhO18_plan) C++17
100 / 100
 595 ms 37828 KB 
#include<bits/stdc++.h>
using namespace std;
int n,m,k;
const int maxn=100000+10;
vector<pair<int,int>>adj[maxn];
vector<int>allk;
pair<int,int>stf[maxn],part[maxn];
int dis[maxn],vis[maxn],vist[maxn],par[maxn],sz[maxn];
vector<int>adjt[maxn];
void caldis(){
	priority_queue<pair<int,int>>pq;
	for(auto x:allk){
		pq.push(make_pair(0,x));
	}
	while(pq.size()>0){
		auto x=pq.top();
		pq.pop();
		if(vis[x.second]==1){
			continue;
		}
		vis[x.second]=1;
		dis[x.second]=-x.first;
		for(auto y:adj[x.second]){
			pq.push(make_pair(-y.second+x.first,y.first));
		}
	}
}

int root(int c){
	if(c==par[c]){
		return c;
	}
	return par[c]=root(par[c]);
}

void merge(int u){
	vist[u]=1;
	for(auto x:adj[u]){
		if(vist[x.first]==1){
			int rootu=root(u),rootv=root(x.first);
			if(rootu!=rootv){
				if(sz[rootu]<sz[rootv]){
					swap(rootu,rootv);
				}
				//cout<<rootu<<" "<<rootv<<"\n";
				sz[rootu]+=sz[rootv];
				par[rootv]=rootu;
				adjt[rootu].push_back(rootv);
				part[rootv]=make_pair(rootu,dis[u]);
			}
		}
	}
}
int timea=0;
void dfs(int u){
	timea++;
	stf[u].first=timea;
	for(auto x:adjt[u]){
		dfs(x);
	}
	stf[u].second=timea;
}

bool zird(int u,int v){
	if(stf[v].first<=stf[u].first&&stf[v].second>=stf[u].second){
		return 1;
	}
	return 0;
}

void solve(int u,int v){
	int res=min(dis[u],dis[v]);
	while(!zird(u,v)){
		res=min(res,part[v].second);
		v=part[v].first;
	}
	while(!zird(v,u)){
		res=min(res,part[u].second);
		u=part[u].first;
	}
	cout<<res<<"\n";
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	for(int i=0;i<maxn;i++){
		par[i]=i;
		sz[i]=1;
	}
	cin>>n>>m;
	for(int i=0;i<m;i++){
		int u,v,w;
		cin>>u>>v>>w;
		adj[u].push_back(make_pair(v,w));
		adj[v].push_back(make_pair(u,w));
	}
	cin>>k;
	allk.resize(k);
	for(int i=0;i<k;i++){
		cin>>allk[i];
	}
	caldis();
	vector<pair<int,int>>fake;
	for(int i=1;i<=n;i++){
		fake.push_back(make_pair(dis[i],i));
		//cout<<i<<" "<<dis[i]<<"\n";
	}
	sort(fake.rbegin(),fake.rend());
	for(int i=0;i<n;i++){
		merge(fake[i].second);
	}
	dfs(root(1));
	int q;
	cin>>q;
	for(int i=0;i<q;i++){
		int u,v;
		cin>>u>>v;
		solve(u,v);
	}
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5844 KB Output is correct
3 Correct 4 ms 5844 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 5 ms 5844 KB Output is correct
6 Correct 5 ms 5844 KB Output is correct
7 Correct 5 ms 5716 KB Output is correct
8 Correct 3 ms 5716 KB Output is correct
9 Correct 4 ms 5916 KB Output is correct
10 Correct 4 ms 5844 KB Output is correct
11 Correct 4 ms 5844 KB Output is correct
12 Correct 5 ms 5844 KB Output is correct
13 Correct 4 ms 5896 KB Output is correct
14 Correct 6 ms 5844 KB Output is correct
15 Correct 4 ms 5844 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5844 KB Output is correct
3 Correct 4 ms 5844 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 5 ms 5844 KB Output is correct
6 Correct 5 ms 5844 KB Output is correct
7 Correct 5 ms 5716 KB Output is correct
8 Correct 3 ms 5716 KB Output is correct
9 Correct 4 ms 5916 KB Output is correct
10 Correct 4 ms 5844 KB Output is correct
11 Correct 4 ms 5844 KB Output is correct
12 Correct 5 ms 5844 KB Output is correct
13 Correct 4 ms 5896 KB Output is correct
14 Correct 6 ms 5844 KB Output is correct
15 Correct 4 ms 5844 KB Output is correct
16 Correct 131 ms 13112 KB Output is correct
17 Correct 551 ms 28856 KB Output is correct
18 Correct 33 ms 7804 KB Output is correct
19 Correct 117 ms 14728 KB Output is correct
20 Correct 552 ms 28896 KB Output is correct
21 Correct 250 ms 17524 KB Output is correct
22 Correct 94 ms 14168 KB Output is correct
23 Correct 547 ms 28912 KB Output is correct
24 Correct 559 ms 28844 KB Output is correct
25 Correct 520 ms 28944 KB Output is correct
26 Correct 113 ms 14352 KB Output is correct
27 Correct 134 ms 14476 KB Output is correct
28 Correct 147 ms 14360 KB Output is correct
29 Correct 106 ms 14528 KB Output is correct
30 Correct 109 ms 14596 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 3 ms 5808 KB Output is correct
3 Correct 3 ms 5716 KB Output is correct
4 Correct 4 ms 5804 KB Output is correct
5 Correct 3 ms 5808 KB Output is correct
6 Correct 3 ms 5804 KB Output is correct
7 Correct 4 ms 5716 KB Output is correct
8 Correct 3 ms 5804 KB Output is correct
9 Correct 3 ms 5716 KB Output is correct
10 Correct 3 ms 5716 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 17104 KB Output is correct
2 Correct 556 ms 37004 KB Output is correct
3 Correct 542 ms 37088 KB Output is correct
4 Correct 73 ms 14796 KB Output is correct
5 Correct 492 ms 37020 KB Output is correct
6 Correct 499 ms 37044 KB Output is correct
7 Correct 525 ms 37104 KB Output is correct
8 Correct 550 ms 37268 KB Output is correct
9 Correct 592 ms 36964 KB Output is correct
10 Correct 463 ms 37092 KB Output is correct
11 Correct 544 ms 37092 KB Output is correct
12 Correct 509 ms 37040 KB Output is correct
13 Correct 487 ms 37048 KB Output is correct
14 Correct 526 ms 37096 KB Output is correct
15 Correct 525 ms 37168 KB Output is correct
16 Correct 535 ms 37036 KB Output is correct
17 Correct 468 ms 37048 KB Output is correct
18 Correct 499 ms 37072 KB Output is correct
19 Correct 60 ms 14916 KB Output is correct
20 Correct 517 ms 37108 KB Output is correct
21 Correct 544 ms 37636 KB Output is correct
22 Correct 97 ms 15788 KB Output is correct
23 Correct 101 ms 15484 KB Output is correct
24 Correct 91 ms 15872 KB Output is correct
25 Correct 101 ms 15884 KB Output is correct
26 Correct 105 ms 15448 KB Output is correct
27 Correct 67 ms 14720 KB Output is correct
28 Correct 100 ms 15860 KB Output is correct
29 Correct 66 ms 14660 KB Output is correct
30 Correct 104 ms 15856 KB Output is correct
31 Correct 70 ms 14704 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5844 KB Output is correct
3 Correct 4 ms 5844 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 5 ms 5844 KB Output is correct
6 Correct 5 ms 5844 KB Output is correct
7 Correct 5 ms 5716 KB Output is correct
8 Correct 3 ms 5716 KB Output is correct
9 Correct 4 ms 5916 KB Output is correct
10 Correct 4 ms 5844 KB Output is correct
11 Correct 4 ms 5844 KB Output is correct
12 Correct 5 ms 5844 KB Output is correct
13 Correct 4 ms 5896 KB Output is correct
14 Correct 6 ms 5844 KB Output is correct
15 Correct 4 ms 5844 KB Output is correct
16 Correct 131 ms 13112 KB Output is correct
17 Correct 551 ms 28856 KB Output is correct
18 Correct 33 ms 7804 KB Output is correct
19 Correct 117 ms 14728 KB Output is correct
20 Correct 552 ms 28896 KB Output is correct
21 Correct 250 ms 17524 KB Output is correct
22 Correct 94 ms 14168 KB Output is correct
23 Correct 547 ms 28912 KB Output is correct
24 Correct 559 ms 28844 KB Output is correct
25 Correct 520 ms 28944 KB Output is correct
26 Correct 113 ms 14352 KB Output is correct
27 Correct 134 ms 14476 KB Output is correct
28 Correct 147 ms 14360 KB Output is correct
29 Correct 106 ms 14528 KB Output is correct
30 Correct 109 ms 14596 KB Output is correct
31 Correct 3 ms 5716 KB Output is correct
32 Correct 3 ms 5808 KB Output is correct
33 Correct 3 ms 5716 KB Output is correct
34 Correct 4 ms 5804 KB Output is correct
35 Correct 3 ms 5808 KB Output is correct
36 Correct 3 ms 5804 KB Output is correct
37 Correct 4 ms 5716 KB Output is correct
38 Correct 3 ms 5804 KB Output is correct
39 Correct 3 ms 5716 KB Output is correct
40 Correct 3 ms 5716 KB Output is correct
41 Correct 207 ms 17104 KB Output is correct
42 Correct 556 ms 37004 KB Output is correct
43 Correct 542 ms 37088 KB Output is correct
44 Correct 73 ms 14796 KB Output is correct
45 Correct 492 ms 37020 KB Output is correct
46 Correct 499 ms 37044 KB Output is correct
47 Correct 525 ms 37104 KB Output is correct
48 Correct 550 ms 37268 KB Output is correct
49 Correct 592 ms 36964 KB Output is correct
50 Correct 463 ms 37092 KB Output is correct
51 Correct 544 ms 37092 KB Output is correct
52 Correct 509 ms 37040 KB Output is correct
53 Correct 487 ms 37048 KB Output is correct
54 Correct 526 ms 37096 KB Output is correct
55 Correct 525 ms 37168 KB Output is correct
56 Correct 535 ms 37036 KB Output is correct
57 Correct 468 ms 37048 KB Output is correct
58 Correct 499 ms 37072 KB Output is correct
59 Correct 60 ms 14916 KB Output is correct
60 Correct 517 ms 37108 KB Output is correct
61 Correct 544 ms 37636 KB Output is correct
62 Correct 97 ms 15788 KB Output is correct
63 Correct 101 ms 15484 KB Output is correct
64 Correct 91 ms 15872 KB Output is correct
65 Correct 101 ms 15884 KB Output is correct
66 Correct 105 ms 15448 KB Output is correct
67 Correct 67 ms 14720 KB Output is correct
68 Correct 100 ms 15860 KB Output is correct
69 Correct 66 ms 14660 KB Output is correct
70 Correct 104 ms 15856 KB Output is correct
71 Correct 70 ms 14704 KB Output is correct
72 Correct 270 ms 22040 KB Output is correct
73 Correct 568 ms 37228 KB Output is correct
74 Correct 574 ms 37240 KB Output is correct
75 Correct 514 ms 37256 KB Output is correct
76 Correct 502 ms 37144 KB Output is correct
77 Correct 574 ms 37176 KB Output is correct
78 Correct 528 ms 37220 KB Output is correct
79 Correct 548 ms 37244 KB Output is correct
80 Correct 538 ms 37264 KB Output is correct
81 Correct 518 ms 37184 KB Output is correct
82 Correct 595 ms 37252 KB Output is correct
83 Correct 591 ms 37372 KB Output is correct
84 Correct 531 ms 37200 KB Output is correct
85 Correct 536 ms 37372 KB Output is correct
86 Correct 523 ms 37248 KB Output is correct
87 Correct 524 ms 37224 KB Output is correct
88 Correct 556 ms 37268 KB Output is correct
89 Correct 106 ms 17080 KB Output is correct
90 Correct 525 ms 37184 KB Output is correct
91 Correct 581 ms 37828 KB Output is correct
92 Correct 115 ms 17404 KB Output is correct
93 Correct 120 ms 17476 KB Output is correct
94 Correct 125 ms 17280 KB Output is correct
95 Correct 125 ms 17412 KB Output is correct
96 Correct 146 ms 17004 KB Output is correct
97 Correct 89 ms 16576 KB Output is correct
98 Correct 121 ms 17320 KB Output is correct
99 Correct 110 ms 16656 KB Output is correct
100 Correct 131 ms 17380 KB Output is correct