답안 #1053382

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1053382	2024-08-11T11:16:10 Z	vincentbucourt1	경주 (Race) (IOI11_race)	C++14	100 / 100	233 ms	81488 KB

race

#include "race.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second

const static ll INF = 1e18;
const static ll MAXN = 200001;

static ll N, sumNeed;
static vector<pair<ll, ll>> adj[MAXN];

static ll depth[MAXN], sum[MAXN];
static map<ll, ll> maps[MAXN];
static ll ans = INF;

void dfs (ll node = 0, ll parent = -1) {
	maps[node][sum[node]] = depth[node];
	for (pair<ll, ll> nxt : adj[node]) {
		ll nodenxt = nxt.f, weightnxt = nxt.s;
		if (nodenxt == parent) continue;

		depth[nodenxt] = depth[node] + 1;
		sum[nodenxt] = sum[node] + weightnxt;

		dfs(nodenxt, node);

		if (maps[nodenxt].size() > maps[node].size()) swap(maps[nodenxt], maps[node]);

		for (pair<ll, ll> elem : maps[nodenxt]) {
			ll sumOn = elem.f, depthOn = elem.s;

			ll need = -sumOn + 2*sum[node] + sumNeed;
			if (maps[node].find(need) != maps[node].end()) {
				ans = min(ans, maps[node][need] - 2*depth[node] + depthOn);
			}
		}
		for (pair<ll, ll> elem : maps[nodenxt]) {
			ll sumOn = elem.f, depthOn = elem.s;

			ll need = -sumOn + 2*sum[node] + sumNeed;
			if (maps[node].find(sumOn) == maps[node].end()) {
				maps[node][sumOn] = depthOn;
			}
			else {
				maps[node][sumOn] = min(maps[node][sumOn], depthOn);
			}
		}
		maps[nodenxt].clear();
	}
}

int best_path(int N, int K, int H[][2], int L[])
{
	::N = (ll) N;
	sumNeed = (ll) K;

	if (sumNeed == 1) return 0;
	
	for (int i = 0; i < N-1; i++) {
		adj[H[i][0]].push_back({(ll) H[i][1], (ll) L[i]});
		adj[H[i][1]].push_back({(ll) H[i][0], (ll) L[i]});
	}

	dfs();

	if (ans == INF) return -1;
	else return (int) ans;
}

Compilation message

race.cpp: In function 'void dfs(long long int, long long int)':
race.cpp:42:7: warning: unused variable 'need' [-Wunused-variable]
   42 |    ll need = -sumOn + 2*sum[node] + sumNeed;
      |       ^~~~

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	21084 KB	Output is correct
2	Correct	3 ms	21084 KB	Output is correct
3	Correct	2 ms	21084 KB	Output is correct
4	Correct	2 ms	21084 KB	Output is correct
5	Correct	2 ms	21148 KB	Output is correct
6	Correct	2 ms	21084 KB	Output is correct
7	Correct	2 ms	21084 KB	Output is correct
8	Correct	2 ms	21176 KB	Output is correct
9	Correct	3 ms	21084 KB	Output is correct
10	Correct	3 ms	21084 KB	Output is correct
11	Correct	2 ms	21084 KB	Output is correct
12	Correct	2 ms	21084 KB	Output is correct
13	Correct	2 ms	21084 KB	Output is correct
14	Correct	2 ms	21084 KB	Output is correct
15	Correct	2 ms	21176 KB	Output is correct
16	Correct	2 ms	21084 KB	Output is correct
17	Correct	2 ms	21084 KB	Output is correct
18	Correct	2 ms	21084 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	21084 KB	Output is correct
2	Correct	3 ms	21084 KB	Output is correct
3	Correct	2 ms	21084 KB	Output is correct
4	Correct	2 ms	21084 KB	Output is correct
5	Correct	2 ms	21148 KB	Output is correct
6	Correct	2 ms	21084 KB	Output is correct
7	Correct	2 ms	21084 KB	Output is correct
8	Correct	2 ms	21176 KB	Output is correct
9	Correct	3 ms	21084 KB	Output is correct
10	Correct	3 ms	21084 KB	Output is correct
11	Correct	2 ms	21084 KB	Output is correct
12	Correct	2 ms	21084 KB	Output is correct
13	Correct	2 ms	21084 KB	Output is correct
14	Correct	2 ms	21084 KB	Output is correct
15	Correct	2 ms	21176 KB	Output is correct
16	Correct	2 ms	21084 KB	Output is correct
17	Correct	2 ms	21084 KB	Output is correct
18	Correct	2 ms	21084 KB	Output is correct
19	Correct	3 ms	21080 KB	Output is correct
20	Correct	2 ms	21084 KB	Output is correct
21	Correct	3 ms	21376 KB	Output is correct
22	Correct	3 ms	21340 KB	Output is correct
23	Correct	3 ms	21340 KB	Output is correct
24	Correct	3 ms	21340 KB	Output is correct
25	Correct	3 ms	21340 KB	Output is correct
26	Correct	3 ms	21340 KB	Output is correct
27	Correct	3 ms	21280 KB	Output is correct
28	Correct	3 ms	21340 KB	Output is correct
29	Correct	3 ms	21340 KB	Output is correct
30	Correct	3 ms	21340 KB	Output is correct
31	Correct	3 ms	21424 KB	Output is correct
32	Correct	3 ms	21372 KB	Output is correct
33	Correct	3 ms	21340 KB	Output is correct
34	Correct	3 ms	21336 KB	Output is correct
35	Correct	3 ms	21340 KB	Output is correct
36	Correct	3 ms	21340 KB	Output is correct
37	Correct	4 ms	21340 KB	Output is correct
38	Correct	3 ms	21340 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	21084 KB	Output is correct
2	Correct	3 ms	21084 KB	Output is correct
3	Correct	2 ms	21084 KB	Output is correct
4	Correct	2 ms	21084 KB	Output is correct
5	Correct	2 ms	21148 KB	Output is correct
6	Correct	2 ms	21084 KB	Output is correct
7	Correct	2 ms	21084 KB	Output is correct
8	Correct	2 ms	21176 KB	Output is correct
9	Correct	3 ms	21084 KB	Output is correct
10	Correct	3 ms	21084 KB	Output is correct
11	Correct	2 ms	21084 KB	Output is correct
12	Correct	2 ms	21084 KB	Output is correct
13	Correct	2 ms	21084 KB	Output is correct
14	Correct	2 ms	21084 KB	Output is correct
15	Correct	2 ms	21176 KB	Output is correct
16	Correct	2 ms	21084 KB	Output is correct
17	Correct	2 ms	21084 KB	Output is correct
18	Correct	2 ms	21084 KB	Output is correct
19	Correct	52 ms	28656 KB	Output is correct
20	Correct	53 ms	28504 KB	Output is correct
21	Correct	46 ms	28504 KB	Output is correct
22	Correct	52 ms	28496 KB	Output is correct
23	Correct	74 ms	29220 KB	Output is correct
24	Correct	57 ms	28252 KB	Output is correct
25	Correct	44 ms	40784 KB	Output is correct
26	Correct	40 ms	51468 KB	Output is correct
27	Correct	95 ms	34528 KB	Output is correct
28	Correct	154 ms	79700 KB	Output is correct
29	Correct	162 ms	78044 KB	Output is correct
30	Correct	95 ms	34388 KB	Output is correct
31	Correct	91 ms	34528 KB	Output is correct
32	Correct	95 ms	34632 KB	Output is correct
33	Correct	108 ms	33876 KB	Output is correct
34	Correct	181 ms	46420 KB	Output is correct

Subtask #4
57.0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	21084 KB	Output is correct
2	Correct	3 ms	21084 KB	Output is correct
3	Correct	2 ms	21084 KB	Output is correct
4	Correct	2 ms	21084 KB	Output is correct
5	Correct	2 ms	21148 KB	Output is correct
6	Correct	2 ms	21084 KB	Output is correct
7	Correct	2 ms	21084 KB	Output is correct
8	Correct	2 ms	21176 KB	Output is correct
9	Correct	3 ms	21084 KB	Output is correct
10	Correct	3 ms	21084 KB	Output is correct
11	Correct	2 ms	21084 KB	Output is correct
12	Correct	2 ms	21084 KB	Output is correct
13	Correct	2 ms	21084 KB	Output is correct
14	Correct	2 ms	21084 KB	Output is correct
15	Correct	2 ms	21176 KB	Output is correct
16	Correct	2 ms	21084 KB	Output is correct
17	Correct	2 ms	21084 KB	Output is correct
18	Correct	2 ms	21084 KB	Output is correct
19	Correct	3 ms	21080 KB	Output is correct
20	Correct	2 ms	21084 KB	Output is correct
21	Correct	3 ms	21376 KB	Output is correct
22	Correct	3 ms	21340 KB	Output is correct
23	Correct	3 ms	21340 KB	Output is correct
24	Correct	3 ms	21340 KB	Output is correct
25	Correct	3 ms	21340 KB	Output is correct
26	Correct	3 ms	21340 KB	Output is correct
27	Correct	3 ms	21280 KB	Output is correct
28	Correct	3 ms	21340 KB	Output is correct
29	Correct	3 ms	21340 KB	Output is correct
30	Correct	3 ms	21340 KB	Output is correct
31	Correct	3 ms	21424 KB	Output is correct
32	Correct	3 ms	21372 KB	Output is correct
33	Correct	3 ms	21340 KB	Output is correct
34	Correct	3 ms	21336 KB	Output is correct
35	Correct	3 ms	21340 KB	Output is correct
36	Correct	3 ms	21340 KB	Output is correct
37	Correct	4 ms	21340 KB	Output is correct
38	Correct	3 ms	21340 KB	Output is correct
39	Correct	52 ms	28656 KB	Output is correct
40	Correct	53 ms	28504 KB	Output is correct
41	Correct	46 ms	28504 KB	Output is correct
42	Correct	52 ms	28496 KB	Output is correct
43	Correct	74 ms	29220 KB	Output is correct
44	Correct	57 ms	28252 KB	Output is correct
45	Correct	44 ms	40784 KB	Output is correct
46	Correct	40 ms	51468 KB	Output is correct
47	Correct	95 ms	34528 KB	Output is correct
48	Correct	154 ms	79700 KB	Output is correct
49	Correct	162 ms	78044 KB	Output is correct
50	Correct	95 ms	34388 KB	Output is correct
51	Correct	91 ms	34528 KB	Output is correct
52	Correct	95 ms	34632 KB	Output is correct
53	Correct	108 ms	33876 KB	Output is correct
54	Correct	181 ms	46420 KB	Output is correct
55	Correct	10 ms	22108 KB	Output is correct
56	Correct	6 ms	21848 KB	Output is correct
57	Correct	40 ms	28900 KB	Output is correct
58	Correct	26 ms	29132 KB	Output is correct
59	Correct	58 ms	52828 KB	Output is correct
60	Correct	158 ms	81488 KB	Output is correct
61	Correct	121 ms	39252 KB	Output is correct
62	Correct	93 ms	37456 KB	Output is correct
63	Correct	97 ms	37456 KB	Output is correct
64	Correct	233 ms	45768 KB	Output is correct
65	Correct	224 ms	50260 KB	Output is correct
66	Correct	162 ms	77652 KB	Output is correct
67	Correct	77 ms	37060 KB	Output is correct
68	Correct	183 ms	47952 KB	Output is correct
69	Correct	193 ms	52304 KB	Output is correct
70	Correct	167 ms	46932 KB	Output is correct

답안 #1053382

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