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답안 #306341

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
306341 2020-09-25T09:14:22 Z syy 경주 (Race) (IOI11_race) C++17
100 / 100
 742 ms 35692 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define FOR(i, a, b) for(int i = (int)a; i <= (int)b; i++)
#define DEC(i, a, b) for(int i = (int)a; i >= (int)b; i--)
typedef pair<int, int> pi;
typedef pair<int, pi> pii;
typedef pair<pi, pi> pipi;
#define f first
#define s second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<pii> vpii;
#define pb push_back
#define pf push_front
#define all(v) v.begin(), v.end()
#define disc(v) sort(all(v)); v.resize(unique(all(v)) - v.begin());
#define INF (int) 1e9 + 100
#define LLINF (ll) 1e18
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)

int n, k, sz[200005], coun, ans = INF;
int newdist[1000005], dist[1000005];
bool vis[200005];
vpi adj[200005];

int sztrsz(int x, int p) {
	sz[x] = 1;
	for (auto it:adj[x]) if (!vis[it.f] and it.f != p) sz[x] += sztrsz(it.f, x);
	return sz[x];
}

int findcent(int x, int p, int n) {
	for (auto it:adj[x]) {
		if (vis[it.f]) continue;
		if (it.f != p and sz[it.f] > n/2 and !vis[it.f]) return findcent(it.f, x, n);
	}
	return x;
}

void dfsend(int x, int p, int d, int num) {
	if (d == k) ans = min(ans, num);
	if (d > k) return;
	for (auto it:adj[x]) if (!vis[it.f] and it.f != p) dfsend(it.f, x, d+it.s, num+1);
}

vi cur, temp;

void dfs(int x, int p, int d, int num) {
	if (d == k) ans = min(ans, num);
	if (d > k) return;
	if (dist[k-d] != INF) ans = min(ans, num + dist[k-d]);
	newdist[d] = min(newdist[d], num);
	cur.pb(d); temp.pb(d);
	for (auto it:adj[x]) if (it.f != p and !vis[it.f]) dfs(it.f, x, d + it.s, num+1);
}

void solve(int x) {
	int cent = findcent(x, -1, sztrsz(x, -1));
	dfsend(cent, -1, 0, 0);
	for (auto it:adj[cent]) if (!vis[it.f]) {
		dfs(it.f, cent, it.s, 1);
		for (auto d:temp) dist[d] = min(dist[d], newdist[d]);
		temp.clear();
	}
	for (auto it:cur) dist[it] = newdist[it] = INF;
	cur.clear();
	vis[cent] = 1;
	for (auto it:adj[cent]) if (!vis[it.f]) solve(it.f);
}

int best_path(int N, int K, int H[][2], int L[]) {
	n = N, k = K;
	FOR(i, 0, n-2) {
		adj[H[i][0]].pb(pi(H[i][1], L[i]));
		adj[H[i][1]].pb(pi(H[i][0], L[i]));
	}
	FOR(i, 0, K) dist[i] = newdist[i] = INF;
	solve(0);
	return (ans == INF ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 13 ms 5120 KB Output is correct
7 Correct 19 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 4 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 13 ms 5120 KB Output is correct
7 Correct 19 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 4 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 4 ms 5120 KB Output is correct
20 Correct 4 ms 5120 KB Output is correct
21 Correct 5 ms 5120 KB Output is correct
22 Correct 9 ms 12288 KB Output is correct
23 Correct 9 ms 11008 KB Output is correct
24 Correct 9 ms 11904 KB Output is correct
25 Correct 9 ms 11648 KB Output is correct
26 Correct 6 ms 7808 KB Output is correct
27 Correct 8 ms 11392 KB Output is correct
28 Correct 7 ms 6656 KB Output is correct
29 Correct 6 ms 7680 KB Output is correct
30 Correct 7 ms 7936 KB Output is correct
31 Correct 8 ms 10240 KB Output is correct
32 Correct 9 ms 10624 KB Output is correct
33 Correct 9 ms 11264 KB Output is correct
34 Correct 8 ms 9728 KB Output is correct
35 Correct 9 ms 11520 KB Output is correct
36 Correct 9 ms 12416 KB Output is correct
37 Correct 9 ms 11392 KB Output is correct
38 Correct 7 ms 9088 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 13 ms 5120 KB Output is correct
7 Correct 19 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 4 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 175 ms 11896 KB Output is correct
20 Correct 176 ms 11768 KB Output is correct
21 Correct 203 ms 12188 KB Output is correct
22 Correct 173 ms 12580 KB Output is correct
23 Correct 110 ms 12024 KB Output is correct
24 Correct 78 ms 12024 KB Output is correct
25 Correct 149 ms 13688 KB Output is correct
26 Correct 112 ms 16756 KB Output is correct
27 Correct 255 ms 18936 KB Output is correct
28 Correct 350 ms 27000 KB Output is correct
29 Correct 409 ms 26488 KB Output is correct
30 Correct 241 ms 18808 KB Output is correct
31 Correct 242 ms 18936 KB Output is correct
32 Correct 276 ms 18936 KB Output is correct
33 Correct 290 ms 17656 KB Output is correct
34 Correct 276 ms 18788 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 13 ms 5120 KB Output is correct
7 Correct 19 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 4 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 3 ms 5120 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 4 ms 5120 KB Output is correct
20 Correct 4 ms 5120 KB Output is correct
21 Correct 5 ms 5120 KB Output is correct
22 Correct 9 ms 12288 KB Output is correct
23 Correct 9 ms 11008 KB Output is correct
24 Correct 9 ms 11904 KB Output is correct
25 Correct 9 ms 11648 KB Output is correct
26 Correct 6 ms 7808 KB Output is correct
27 Correct 8 ms 11392 KB Output is correct
28 Correct 7 ms 6656 KB Output is correct
29 Correct 6 ms 7680 KB Output is correct
30 Correct 7 ms 7936 KB Output is correct
31 Correct 8 ms 10240 KB Output is correct
32 Correct 9 ms 10624 KB Output is correct
33 Correct 9 ms 11264 KB Output is correct
34 Correct 8 ms 9728 KB Output is correct
35 Correct 9 ms 11520 KB Output is correct
36 Correct 9 ms 12416 KB Output is correct
37 Correct 9 ms 11392 KB Output is correct
38 Correct 7 ms 9088 KB Output is correct
39 Correct 175 ms 11896 KB Output is correct
40 Correct 176 ms 11768 KB Output is correct
41 Correct 203 ms 12188 KB Output is correct
42 Correct 173 ms 12580 KB Output is correct
43 Correct 110 ms 12024 KB Output is correct
44 Correct 78 ms 12024 KB Output is correct
45 Correct 149 ms 13688 KB Output is correct
46 Correct 112 ms 16756 KB Output is correct
47 Correct 255 ms 18936 KB Output is correct
48 Correct 350 ms 27000 KB Output is correct
49 Correct 409 ms 26488 KB Output is correct
50 Correct 241 ms 18808 KB Output is correct
51 Correct 242 ms 18936 KB Output is correct
52 Correct 276 ms 18936 KB Output is correct
53 Correct 290 ms 17656 KB Output is correct
54 Correct 276 ms 18788 KB Output is correct
55 Correct 14 ms 5888 KB Output is correct
56 Correct 15 ms 5888 KB Output is correct
57 Correct 111 ms 12700 KB Output is correct
58 Correct 65 ms 12636 KB Output is correct
59 Correct 112 ms 18164 KB Output is correct
60 Correct 630 ms 35692 KB Output is correct
61 Correct 258 ms 19320 KB Output is correct
62 Correct 299 ms 27644 KB Output is correct
63 Correct 402 ms 27644 KB Output is correct
64 Correct 742 ms 24604 KB Output is correct
65 Correct 302 ms 19704 KB Output is correct
66 Correct 567 ms 32888 KB Output is correct
67 Correct 188 ms 29160 KB Output is correct
68 Correct 405 ms 27892 KB Output is correct
69 Correct 482 ms 28028 KB Output is correct
70 Correct 376 ms 27252 KB Output is correct