답안 #386099

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
386099	2021-04-05T15:44:26 Z	cpp219	경주 (Race) (IOI11_race)	C++14	100 / 100	1053 ms	33644 KB

race

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef long double ld;
#define pb push_back
#define mp make_pair
#define pii pair <int, int>
#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define F first
#define S second
 
const int maxn = 2e5 + 5, maxk = 1e6 + 5;
vector <pii> adj[maxn];
int w[maxn], sz[maxn];
int h[maxn], d[maxn], mn[maxk];
int n, k;
int inf = 1e9 + 7, ans = 1e9 + 7;
bool dead[maxn];
 
void dfs(int v, int p = -1){
	sz[v] = 1;
	for(auto u : adj[v]){
		if(u.F != p && !dead[u.F]){
			d[u.F] = d[v] + w[u.S];
			h[u.F] = h[v] + 1;
			dfs(u.F, v);
			sz[v] += sz[u.F]; 
		}
	}
}
int find_centroid(int v, int p, int z){
	for(auto u : adj[v]){
		if(u.F != p && !dead[u.F] && sz[u.F] > z / 2){
			return find_centroid(u.F, v, z);
		}
	}
	return v;
}
 
void get(int v, int p = -1){
	if(k - d[v] >= 0 && k - d[v] < maxk - 2){
		ans = min(mn[k - d[v]] + h[v], ans);
	}
	for(auto u : adj[v]){
		if(u.F != p && !dead[u.F]){
			get(u.F, v);
		}
	}
}
void upd(int v, int p = -1){
	if(d[v] >= 0 && d[v] < maxk - 2){
		mn[d[v]] = min(h[v], mn[d[v]]);
	}
	for(auto u : adj[v]){
		if(u.F != p && !dead[u.F]){
			upd(u.F, v);
		}
	}
}
void clr(int v, int p = -1){
	if(d[v] >= 0 && d[v] < maxk - 2){
		mn[d[v]] = inf;
	}
	for(auto u : adj[v]){
		if(u.F != p && !dead[u.F]){
			clr(u.F, v);
		}
	}
}
 
void solve(int v){
	dfs(v);
	int c = find_centroid(v, -1, sz[v]);
	dead[c] = true;
	h[c] = d[c] = 0;
	dfs(c);
	for(auto x : adj[c]){
		int u = x.F;
		if(!dead[u]){
			get(u, c);
			upd(u, c);
		}
	}
	ans = min(ans, mn[k]);
	clr(c);
	for(auto x : adj[c]){
		if(!dead[x.F]){
			solve(x.F);
		}
	}
}
int best_path(int N, int K, int H[][2], int L[]){
	n = N;
	k = K;
	
	for(int i = 0; i < n - 1; i ++){
		int x = H[i][0], y = H[i][1];
		adj[x].push_back({y, i});
		adj[y].push_back({x, i});
	}	
	for(int i = 0; i < n - 1; i ++)
		w[i] = L[i];
	
	for(int i = 0; i < maxk - 2; i ++){
		mn[i] = inf;
	}
	
	solve(0);
 
	if(ans >= inf){
		ans = -1;
	}
		
	return ans;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	8940 KB	Output is correct
2	Correct	7 ms	8940 KB	Output is correct
3	Correct	7 ms	8940 KB	Output is correct
4	Correct	7 ms	8940 KB	Output is correct
5	Correct	7 ms	8940 KB	Output is correct
6	Correct	8 ms	8940 KB	Output is correct
7	Correct	8 ms	8940 KB	Output is correct
8	Correct	7 ms	8940 KB	Output is correct
9	Correct	7 ms	8940 KB	Output is correct
10	Correct	7 ms	8940 KB	Output is correct
11	Correct	7 ms	8940 KB	Output is correct
12	Correct	7 ms	8940 KB	Output is correct
13	Correct	7 ms	8940 KB	Output is correct
14	Correct	7 ms	8940 KB	Output is correct
15	Correct	7 ms	8940 KB	Output is correct
16	Correct	7 ms	8940 KB	Output is correct
17	Correct	7 ms	8940 KB	Output is correct
18	Correct	7 ms	8940 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	8940 KB	Output is correct
2	Correct	7 ms	8940 KB	Output is correct
3	Correct	7 ms	8940 KB	Output is correct
4	Correct	7 ms	8940 KB	Output is correct
5	Correct	7 ms	8940 KB	Output is correct
6	Correct	8 ms	8940 KB	Output is correct
7	Correct	8 ms	8940 KB	Output is correct
8	Correct	7 ms	8940 KB	Output is correct
9	Correct	7 ms	8940 KB	Output is correct
10	Correct	7 ms	8940 KB	Output is correct
11	Correct	7 ms	8940 KB	Output is correct
12	Correct	7 ms	8940 KB	Output is correct
13	Correct	7 ms	8940 KB	Output is correct
14	Correct	7 ms	8940 KB	Output is correct
15	Correct	7 ms	8940 KB	Output is correct
16	Correct	7 ms	8940 KB	Output is correct
17	Correct	7 ms	8940 KB	Output is correct
18	Correct	7 ms	8940 KB	Output is correct
19	Correct	7 ms	8940 KB	Output is correct
20	Correct	7 ms	8940 KB	Output is correct
21	Correct	8 ms	9068 KB	Output is correct
22	Correct	8 ms	9196 KB	Output is correct
23	Correct	8 ms	9068 KB	Output is correct
24	Correct	8 ms	9068 KB	Output is correct
25	Correct	8 ms	9068 KB	Output is correct
26	Correct	8 ms	9068 KB	Output is correct
27	Correct	8 ms	9068 KB	Output is correct
28	Correct	8 ms	9068 KB	Output is correct
29	Correct	8 ms	9068 KB	Output is correct
30	Correct	8 ms	9068 KB	Output is correct
31	Correct	9 ms	9068 KB	Output is correct
32	Correct	8 ms	9068 KB	Output is correct
33	Correct	8 ms	9068 KB	Output is correct
34	Correct	8 ms	9068 KB	Output is correct
35	Correct	8 ms	9068 KB	Output is correct
36	Correct	10 ms	9068 KB	Output is correct
37	Correct	8 ms	9088 KB	Output is correct
38	Correct	8 ms	9068 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	8940 KB	Output is correct
2	Correct	7 ms	8940 KB	Output is correct
3	Correct	7 ms	8940 KB	Output is correct
4	Correct	7 ms	8940 KB	Output is correct
5	Correct	7 ms	8940 KB	Output is correct
6	Correct	8 ms	8940 KB	Output is correct
7	Correct	8 ms	8940 KB	Output is correct
8	Correct	7 ms	8940 KB	Output is correct
9	Correct	7 ms	8940 KB	Output is correct
10	Correct	7 ms	8940 KB	Output is correct
11	Correct	7 ms	8940 KB	Output is correct
12	Correct	7 ms	8940 KB	Output is correct
13	Correct	7 ms	8940 KB	Output is correct
14	Correct	7 ms	8940 KB	Output is correct
15	Correct	7 ms	8940 KB	Output is correct
16	Correct	7 ms	8940 KB	Output is correct
17	Correct	7 ms	8940 KB	Output is correct
18	Correct	7 ms	8940 KB	Output is correct
19	Correct	321 ms	15464 KB	Output is correct
20	Correct	344 ms	15524 KB	Output is correct
21	Correct	328 ms	15468 KB	Output is correct
22	Correct	247 ms	15724 KB	Output is correct
23	Correct	205 ms	15724 KB	Output is correct
24	Correct	107 ms	15596 KB	Output is correct
25	Correct	272 ms	18284 KB	Output is correct
26	Correct	167 ms	21356 KB	Output is correct
27	Correct	303 ms	22124 KB	Output is correct
28	Correct	919 ms	33588 KB	Output is correct
29	Correct	1020 ms	32620 KB	Output is correct
30	Correct	343 ms	22244 KB	Output is correct
31	Correct	321 ms	22252 KB	Output is correct
32	Correct	501 ms	22232 KB	Output is correct
33	Correct	669 ms	21100 KB	Output is correct
34	Correct	610 ms	21100 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	8940 KB	Output is correct
2	Correct	7 ms	8940 KB	Output is correct
3	Correct	7 ms	8940 KB	Output is correct
4	Correct	7 ms	8940 KB	Output is correct
5	Correct	7 ms	8940 KB	Output is correct
6	Correct	8 ms	8940 KB	Output is correct
7	Correct	8 ms	8940 KB	Output is correct
8	Correct	7 ms	8940 KB	Output is correct
9	Correct	7 ms	8940 KB	Output is correct
10	Correct	7 ms	8940 KB	Output is correct
11	Correct	7 ms	8940 KB	Output is correct
12	Correct	7 ms	8940 KB	Output is correct
13	Correct	7 ms	8940 KB	Output is correct
14	Correct	7 ms	8940 KB	Output is correct
15	Correct	7 ms	8940 KB	Output is correct
16	Correct	7 ms	8940 KB	Output is correct
17	Correct	7 ms	8940 KB	Output is correct
18	Correct	7 ms	8940 KB	Output is correct
19	Correct	7 ms	8940 KB	Output is correct
20	Correct	7 ms	8940 KB	Output is correct
21	Correct	8 ms	9068 KB	Output is correct
22	Correct	8 ms	9196 KB	Output is correct
23	Correct	8 ms	9068 KB	Output is correct
24	Correct	8 ms	9068 KB	Output is correct
25	Correct	8 ms	9068 KB	Output is correct
26	Correct	8 ms	9068 KB	Output is correct
27	Correct	8 ms	9068 KB	Output is correct
28	Correct	8 ms	9068 KB	Output is correct
29	Correct	8 ms	9068 KB	Output is correct
30	Correct	8 ms	9068 KB	Output is correct
31	Correct	9 ms	9068 KB	Output is correct
32	Correct	8 ms	9068 KB	Output is correct
33	Correct	8 ms	9068 KB	Output is correct
34	Correct	8 ms	9068 KB	Output is correct
35	Correct	8 ms	9068 KB	Output is correct
36	Correct	10 ms	9068 KB	Output is correct
37	Correct	8 ms	9088 KB	Output is correct
38	Correct	8 ms	9068 KB	Output is correct
39	Correct	321 ms	15464 KB	Output is correct
40	Correct	344 ms	15524 KB	Output is correct
41	Correct	328 ms	15468 KB	Output is correct
42	Correct	247 ms	15724 KB	Output is correct
43	Correct	205 ms	15724 KB	Output is correct
44	Correct	107 ms	15596 KB	Output is correct
45	Correct	272 ms	18284 KB	Output is correct
46	Correct	167 ms	21356 KB	Output is correct
47	Correct	303 ms	22124 KB	Output is correct
48	Correct	919 ms	33588 KB	Output is correct
49	Correct	1020 ms	32620 KB	Output is correct
50	Correct	343 ms	22244 KB	Output is correct
51	Correct	321 ms	22252 KB	Output is correct
52	Correct	501 ms	22232 KB	Output is correct
53	Correct	669 ms	21100 KB	Output is correct
54	Correct	610 ms	21100 KB	Output is correct
55	Correct	18 ms	9580 KB	Output is correct
56	Correct	20 ms	9580 KB	Output is correct
57	Correct	122 ms	15724 KB	Output is correct
58	Correct	51 ms	15712 KB	Output is correct
59	Correct	135 ms	21228 KB	Output is correct
60	Correct	874 ms	32876 KB	Output is correct
61	Correct	301 ms	22124 KB	Output is correct
62	Correct	320 ms	22252 KB	Output is correct
63	Correct	480 ms	22124 KB	Output is correct
64	Correct	1053 ms	22124 KB	Output is correct
65	Correct	738 ms	26092 KB	Output is correct
66	Correct	904 ms	33644 KB	Output is correct
67	Correct	172 ms	25820 KB	Output is correct
68	Correct	511 ms	25836 KB	Output is correct
69	Correct	492 ms	26092 KB	Output is correct
70	Correct	459 ms	25196 KB	Output is correct

답안 #386099

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 12.0 / 12.0

Subtask #3 22.0 / 22.0

Subtask #4 57.0 / 57.0

Subtask #1
9.0 / 9.0

Subtask #2
12.0 / 12.0

Subtask #3
22.0 / 22.0

Subtask #4
57.0 / 57.0