답안 #920281

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
920281	2024-02-02T11:48:23 Z	ting39	Cat Exercise (JOI23_ho_t4)	C++17	100 / 100	491 ms	83348 KB

Main

#include<bits/stdc++.h>
#define int long long
using namespace std;
vector<vector<int>> g,jump;
vector<int> dep;
struct DSU{
	int n;
	vector<int> to,sz,mx,val;
	DSU(int _n):n(_n){
		to.resize(n);
		sz.resize(n,1);
		val.resize(n);
		mx.resize(n);
		for(int i=0;i<n;i++){
			to[i]=i;
			mx[i]=i;
		}
	}
	int fnd(int p){
		if(to[p]==p) return p;
		to[p]=fnd(to[p]);
		return to[p];
	}
	void conn(int a,int b){
		a=fnd(a);
		b=fnd(b);
		if(a==b) return;
		if(sz[a]>sz[b]) swap(a,b);
		to[a]=b;
		sz[b]+=sz[a];
		mx[b]=max(mx[b],mx[a]);
	}
};
void dfs(int pre,int pos){
	for(int i:g[pos]){
		if(i==pre) continue;
		dep[i]=dep[pos]+1;
		jump[i][0]=pos;
		dfs(pos,i);
	}
}
int lca(int a,int b){
	if(dep[a]<dep[b]) swap(a,b);
	int dif=dep[a]-dep[b],c=0;
	while(dif){
		if(dif&1){
			a=jump[a][c];
		}
		c++;
		dif>>=1;
	}
	if(a==b) return a;
	for(int i=20;i>=0;i--){
		if(jump[a][i]!=jump[b][i]){
			a=jump[a][i];
			b=jump[b][i];
		}
	}
	return jump[a][0];
}
int dis(int a,int b){
	int c=lca(a,b);
	return dep[a]+dep[b]-2*dep[c];
}
signed main(){
	int n;
	cin>>n;
	g.resize(n);
	jump.resize(n,vector<int>(21));
	dep.resize(n);
	vector<vector<int>> gg(n);
	vector<int> v(n);
	for(int &i:v){
		cin>>i;
		i--;
	}
	for(int i=0;i<n-1;i++){
		int a,b;
		cin>>a>>b;
		a--;
		b--;
		a=v[a];
		b=v[b];
		g[a].push_back(b);
		g[b].push_back(a);
		gg[max(a,b)].push_back(min(a,b));
	}
	dfs(0,0);
	for(int j=1;j<21;j++){
		for(int i=0;i<n;i++){
			jump[i][j]=jump[jump[i][j-1]][j-1];
		}
	}
	DSU dsu(n);
	for(int i=0;i<n;i++){
		int tmp=0;
		for(int j:gg[i]){
			int a=dis(i,dsu.mx[dsu.fnd(j)])+dsu.val[dsu.fnd(j)];
			if(a>tmp){
				tmp=a;
			}
			dsu.conn(i,j);
		}
		dsu.val[dsu.fnd(i)]=tmp;
	}
	cout<<dsu.val[dsu.fnd(n-1)]<<endl;
}

Subtask #1
7.0 / 7.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct

Subtask #2
7.0 / 7.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct

Subtask #3
7.0 / 7.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	6 ms	2136 KB	Output is correct
19	Correct	5 ms	2392 KB	Output is correct
20	Correct	5 ms	2396 KB	Output is correct
21	Correct	5 ms	2140 KB	Output is correct
22	Correct	5 ms	2392 KB	Output is correct
23	Correct	5 ms	2140 KB	Output is correct
24	Correct	5 ms	2396 KB	Output is correct

Subtask #4
10.0 / 10.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	6 ms	2136 KB	Output is correct
19	Correct	5 ms	2392 KB	Output is correct
20	Correct	5 ms	2396 KB	Output is correct
21	Correct	5 ms	2140 KB	Output is correct
22	Correct	5 ms	2392 KB	Output is correct
23	Correct	5 ms	2140 KB	Output is correct
24	Correct	5 ms	2396 KB	Output is correct
25	Correct	1 ms	432 KB	Output is correct
26	Correct	5 ms	2396 KB	Output is correct
27	Correct	5 ms	2392 KB	Output is correct
28	Correct	5 ms	2392 KB	Output is correct
29	Correct	5 ms	2392 KB	Output is correct
30	Correct	5 ms	2140 KB	Output is correct
31	Correct	5 ms	2136 KB	Output is correct
32	Correct	5 ms	2136 KB	Output is correct
33	Correct	5 ms	2136 KB	Output is correct

Subtask #5
20.0 / 20.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	6 ms	2136 KB	Output is correct
19	Correct	5 ms	2392 KB	Output is correct
20	Correct	5 ms	2396 KB	Output is correct
21	Correct	5 ms	2140 KB	Output is correct
22	Correct	5 ms	2392 KB	Output is correct
23	Correct	5 ms	2140 KB	Output is correct
24	Correct	5 ms	2396 KB	Output is correct
25	Correct	271 ms	79224 KB	Output is correct
26	Correct	308 ms	83348 KB	Output is correct
27	Correct	293 ms	83280 KB	Output is correct
28	Correct	420 ms	81488 KB	Output is correct
29	Correct	451 ms	77672 KB	Output is correct
30	Correct	436 ms	80464 KB	Output is correct
31	Correct	419 ms	79564 KB	Output is correct

Subtask #6
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	397 ms	74152 KB	Output is correct
4	Correct	400 ms	74092 KB	Output is correct
5	Correct	391 ms	73988 KB	Output is correct

Subtask #7
26.0 / 26.0

#	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	344 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	6 ms	2136 KB	Output is correct
19	Correct	5 ms	2392 KB	Output is correct
20	Correct	5 ms	2396 KB	Output is correct
21	Correct	5 ms	2140 KB	Output is correct
22	Correct	5 ms	2392 KB	Output is correct
23	Correct	5 ms	2140 KB	Output is correct
24	Correct	5 ms	2396 KB	Output is correct
25	Correct	1 ms	432 KB	Output is correct
26	Correct	5 ms	2396 KB	Output is correct
27	Correct	5 ms	2392 KB	Output is correct
28	Correct	5 ms	2392 KB	Output is correct
29	Correct	5 ms	2392 KB	Output is correct
30	Correct	5 ms	2140 KB	Output is correct
31	Correct	5 ms	2136 KB	Output is correct
32	Correct	5 ms	2136 KB	Output is correct
33	Correct	5 ms	2136 KB	Output is correct
34	Correct	271 ms	79224 KB	Output is correct
35	Correct	308 ms	83348 KB	Output is correct
36	Correct	293 ms	83280 KB	Output is correct
37	Correct	420 ms	81488 KB	Output is correct
38	Correct	451 ms	77672 KB	Output is correct
39	Correct	436 ms	80464 KB	Output is correct
40	Correct	419 ms	79564 KB	Output is correct
41	Correct	0 ms	344 KB	Output is correct
42	Correct	1 ms	348 KB	Output is correct
43	Correct	397 ms	74152 KB	Output is correct
44	Correct	400 ms	74092 KB	Output is correct
45	Correct	391 ms	73988 KB	Output is correct
46	Correct	357 ms	80964 KB	Output is correct
47	Correct	332 ms	80720 KB	Output is correct
48	Correct	352 ms	80620 KB	Output is correct
49	Correct	327 ms	80612 KB	Output is correct
50	Correct	491 ms	73684 KB	Output is correct
51	Correct	446 ms	73664 KB	Output is correct
52	Correct	462 ms	73808 KB	Output is correct
53	Correct	444 ms	73592 KB	Output is correct

답안 #920281

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 7.0 / 7.0

Subtask #3 7.0 / 7.0

Subtask #4 10.0 / 10.0

Subtask #5 20.0 / 20.0

Subtask #6 23.0 / 23.0

Subtask #7 26.0 / 26.0

Subtask #1
7.0 / 7.0

Subtask #2
7.0 / 7.0

Subtask #3
7.0 / 7.0

Subtask #4
10.0 / 10.0

Subtask #5
20.0 / 20.0

Subtask #6
23.0 / 23.0

Subtask #7
26.0 / 26.0