답안 #399100

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
399100	2021-05-05T09:48:27 Z	usuyus	경주 (Race) (IOI11_race)	C++14	43 / 100	406 ms	94908 KB

race

// solution

#include <bits/stdc++.h>
#define N_ 200005
#define INF ((ll)1e18+5)
using namespace std;
using ll = long long;

struct Edge { ll to, cost; };

ll n, k, len[N_], dep[N_], ans;
vector<Edge> tree[N_];
map<int, ll> mp[N_];

void dfs(int nd, int par) {
	mp[nd][len[nd]] = dep[nd];

	for (Edge e : tree[nd]) {
		if (e.to == par) continue;
		dep[e.to] = dep[nd] + 1;
		len[e.to] = len[nd] + e.cost;
		dfs(e.to, nd);

		if (mp[nd].size() < mp[e.to].size()) {
			swap(mp[nd], mp[e.to]);
		}

		for (auto [x, d] : mp[e.to]) {
			ll y = k + 2 * len[nd] - x;
			if (mp[nd].count(y)) {
				ans = min(ans, d + mp[nd][y] - 2 * dep[nd]);
			}

			if (!mp[nd].count(x)) mp[nd][x] = d;
			else mp[nd][x] = min(mp[nd][x], d);
		}
	}
}

int best_path(int N, int K, int H[][2], int L[]) {
	n = N;
	k = K;

	for (int i=0; i<n-1; i++) {
		tree[H[i][0]].push_back({H[i][1], L[i]});
		tree[H[i][1]].push_back({H[i][0], L[i]});
	}

	ans = INF;
	dfs(0, -1);
	return ans == INF ? -1 : ans;
}

// grader

// // #include "race.h"
// #include <stdio.h>
// #include <stdlib.h>

// #define MAX_N 500000

// static int N, K;
// static int H[MAX_N][2];
// static int L[MAX_N];
// static int solution;

// inline 
// void my_assert(int e) {if (!e) abort();}

// void read_input()
// {
// 	int i;
// 	my_assert(2==scanf("%d %d",&N,&K));
// 	for(i=0; i<N-1; i++)
// 		my_assert(3==scanf("%d %d %d",&H[i][0],&H[i][1],&L[i]));
// 	my_assert(1==scanf("%d",&solution));
// }

// int main()
// {
// 	freopen("race.gir", "r", stdin);
// 	int ans;
// 	read_input();
// 	ans = best_path(N,K,H,L);
// 	if(ans==solution)
// 		printf("Correct.\n");
// 	else
// 		printf("Incorrect. Returned %d, Expected %d.\n",ans,solution);

// 	return 0;
// }

Compilation message

race.cpp: In function 'void dfs(int, int)':
race.cpp:28:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   28 |   for (auto [x, d] : mp[e.to]) {
      |             ^

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	14412 KB	Output is correct
2	Correct	9 ms	14328 KB	Output is correct
3	Correct	9 ms	14444 KB	Output is correct
4	Correct	9 ms	14412 KB	Output is correct
5	Correct	9 ms	14412 KB	Output is correct
6	Correct	9 ms	14412 KB	Output is correct
7	Correct	9 ms	14420 KB	Output is correct
8	Correct	9 ms	14448 KB	Output is correct
9	Correct	9 ms	14412 KB	Output is correct
10	Correct	9 ms	14412 KB	Output is correct
11	Correct	9 ms	14360 KB	Output is correct
12	Correct	9 ms	14412 KB	Output is correct
13	Correct	8 ms	14412 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	9 ms	14412 KB	Output is correct
16	Correct	9 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14412 KB	Output is correct

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	14412 KB	Output is correct
2	Correct	9 ms	14328 KB	Output is correct
3	Correct	9 ms	14444 KB	Output is correct
4	Correct	9 ms	14412 KB	Output is correct
5	Correct	9 ms	14412 KB	Output is correct
6	Correct	9 ms	14412 KB	Output is correct
7	Correct	9 ms	14420 KB	Output is correct
8	Correct	9 ms	14448 KB	Output is correct
9	Correct	9 ms	14412 KB	Output is correct
10	Correct	9 ms	14412 KB	Output is correct
11	Correct	9 ms	14360 KB	Output is correct
12	Correct	9 ms	14412 KB	Output is correct
13	Correct	8 ms	14412 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	9 ms	14412 KB	Output is correct
16	Correct	9 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14412 KB	Output is correct
19	Correct	9 ms	14420 KB	Output is correct
20	Correct	9 ms	14440 KB	Output is correct
21	Correct	10 ms	14668 KB	Output is correct
22	Correct	10 ms	14644 KB	Output is correct
23	Correct	11 ms	14668 KB	Output is correct
24	Correct	10 ms	14668 KB	Output is correct
25	Correct	10 ms	14668 KB	Output is correct
26	Correct	10 ms	14668 KB	Output is correct
27	Correct	10 ms	14548 KB	Output is correct
28	Correct	10 ms	14668 KB	Output is correct
29	Correct	11 ms	14616 KB	Output is correct
30	Correct	10 ms	14744 KB	Output is correct
31	Correct	10 ms	14668 KB	Output is correct
32	Correct	10 ms	14668 KB	Output is correct
33	Correct	10 ms	14668 KB	Output is correct
34	Correct	10 ms	14640 KB	Output is correct
35	Correct	9 ms	14668 KB	Output is correct
36	Correct	9 ms	14668 KB	Output is correct
37	Correct	9 ms	14636 KB	Output is correct
38	Correct	10 ms	14688 KB	Output is correct

Subtask #3
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	14412 KB	Output is correct
2	Correct	9 ms	14328 KB	Output is correct
3	Correct	9 ms	14444 KB	Output is correct
4	Correct	9 ms	14412 KB	Output is correct
5	Correct	9 ms	14412 KB	Output is correct
6	Correct	9 ms	14412 KB	Output is correct
7	Correct	9 ms	14420 KB	Output is correct
8	Correct	9 ms	14448 KB	Output is correct
9	Correct	9 ms	14412 KB	Output is correct
10	Correct	9 ms	14412 KB	Output is correct
11	Correct	9 ms	14360 KB	Output is correct
12	Correct	9 ms	14412 KB	Output is correct
13	Correct	8 ms	14412 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	9 ms	14412 KB	Output is correct
16	Correct	9 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14412 KB	Output is correct
19	Correct	151 ms	37752 KB	Output is correct
20	Correct	150 ms	37788 KB	Output is correct
21	Correct	148 ms	37568 KB	Output is correct
22	Correct	151 ms	38472 KB	Output is correct
23	Correct	191 ms	51344 KB	Output is correct
24	Correct	152 ms	41356 KB	Output is correct
25	Correct	125 ms	40020 KB	Output is correct
26	Correct	74 ms	48148 KB	Output is correct
27	Correct	230 ms	52524 KB	Output is correct
28	Correct	345 ms	94908 KB	Output is correct
29	Correct	346 ms	92980 KB	Output is correct
30	Correct	230 ms	52548 KB	Output is correct
31	Correct	236 ms	52500 KB	Output is correct
32	Correct	316 ms	52676 KB	Output is correct
33	Correct	282 ms	57540 KB	Output is correct
34	Correct	406 ms	90436 KB	Output is correct

Subtask #4
0 / 57.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	14412 KB	Output is correct
2	Correct	9 ms	14328 KB	Output is correct
3	Correct	9 ms	14444 KB	Output is correct
4	Correct	9 ms	14412 KB	Output is correct
5	Correct	9 ms	14412 KB	Output is correct
6	Correct	9 ms	14412 KB	Output is correct
7	Correct	9 ms	14420 KB	Output is correct
8	Correct	9 ms	14448 KB	Output is correct
9	Correct	9 ms	14412 KB	Output is correct
10	Correct	9 ms	14412 KB	Output is correct
11	Correct	9 ms	14360 KB	Output is correct
12	Correct	9 ms	14412 KB	Output is correct
13	Correct	8 ms	14412 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	9 ms	14412 KB	Output is correct
16	Correct	9 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14412 KB	Output is correct
19	Correct	9 ms	14420 KB	Output is correct
20	Correct	9 ms	14440 KB	Output is correct
21	Correct	10 ms	14668 KB	Output is correct
22	Correct	10 ms	14644 KB	Output is correct
23	Correct	11 ms	14668 KB	Output is correct
24	Correct	10 ms	14668 KB	Output is correct
25	Correct	10 ms	14668 KB	Output is correct
26	Correct	10 ms	14668 KB	Output is correct
27	Correct	10 ms	14548 KB	Output is correct
28	Correct	10 ms	14668 KB	Output is correct
29	Correct	11 ms	14616 KB	Output is correct
30	Correct	10 ms	14744 KB	Output is correct
31	Correct	10 ms	14668 KB	Output is correct
32	Correct	10 ms	14668 KB	Output is correct
33	Correct	10 ms	14668 KB	Output is correct
34	Correct	10 ms	14640 KB	Output is correct
35	Correct	9 ms	14668 KB	Output is correct
36	Correct	9 ms	14668 KB	Output is correct
37	Correct	9 ms	14636 KB	Output is correct
38	Correct	10 ms	14688 KB	Output is correct
39	Correct	151 ms	37752 KB	Output is correct
40	Correct	150 ms	37788 KB	Output is correct
41	Correct	148 ms	37568 KB	Output is correct
42	Correct	151 ms	38472 KB	Output is correct
43	Correct	191 ms	51344 KB	Output is correct
44	Correct	152 ms	41356 KB	Output is correct
45	Correct	125 ms	40020 KB	Output is correct
46	Correct	74 ms	48148 KB	Output is correct
47	Correct	230 ms	52524 KB	Output is correct
48	Correct	345 ms	94908 KB	Output is correct
49	Correct	346 ms	92980 KB	Output is correct
50	Correct	230 ms	52548 KB	Output is correct
51	Correct	236 ms	52500 KB	Output is correct
52	Correct	316 ms	52676 KB	Output is correct
53	Correct	282 ms	57540 KB	Output is correct
54	Correct	406 ms	90436 KB	Output is correct
55	Correct	25 ms	17868 KB	Output is correct
56	Correct	19 ms	16580 KB	Output is correct
57	Incorrect	90 ms	36648 KB	Output isn't correct
58	Halted	0 ms	0 KB	-

답안 #399100

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 12.0 / 12.0

Subtask #3 22.0 / 22.0

Subtask #4 0 / 57.0

Subtask #1
9.0 / 9.0

Subtask #2
12.0 / 12.0

Subtask #3
22.0 / 22.0

Subtask #4
0 / 57.0