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답안 #705713

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
705713 2023-03-05T03:00:36 Z khshg 경주 (Race) (IOI11_race) C++14
100 / 100
 485 ms 36140 KB 
//#include "race.h"
#include<bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using str = string;

using pi = pair<int, int>;
using pl = pair<ll, ll>;
using pd = pair<ld, ld>;
#define mp make_pair
#define ff first
#define ss second

template<class T> using V = vector<T>;
#define arr array
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<ld>;
using vs = V<str>;
using vpi = V<pi>;
using vpl = V<pl>;
using vpd = V<pd>;

#define sz(x) (int)((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()

#define lb lower_bound
#define ub upper_bound

#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for(int i = (b) - 1; i >= (a); --i)
#define R0F(i, a) ROF(i, 0, a)
#define rep(a) F0R(_, a)
#define trav(a, x) for(auto& a : x)

template<class T> bool ckmin(T& a, const T& b) { return (b < a ? a = b, 1 : 0); }
template<class T> bool ckmax(T& a, const T& b) { return (b > a ? a = b, 1 : 0); }

int N, K, ans;
vi ssz, kp;
vb vis;
V<vpi> adj;

int dfs0(int s, int p = -1) {
	ssz[s] = 1;
	trav(u, adj[s]) {
		if(u.ff != p && !vis[u.ff]) ssz[s] += dfs0(u.ff, s);
	}
	return ssz[s];
}

int cent(int s, int des, int p = -1) {
	trav(u, adj[s]) {
		if(u.ff != p && !vis[u.ff] && 2 * ssz[u.ff] > des) return cent(u.ff, des, s);
	}
	return s;
}

void dfs1(int s, pi D, int c, int p = -1) {
	if(D.ff > K) return;
	if(c == 0) {
		ckmin(ans, D.ss + kp[K - D.ff]);
	} else if(c == 1) {
		ckmin(kp[D.ff], D.ss);
	} else {
		kp[D.ff] = 0x3f3f3f3f;
	}
	trav(u, adj[s]) {
		if(u.ff != p && !vis[u.ff]) dfs1(u.ff, mp(D.ff + u.ss, D.ss + 1), c, s);
	}
}

void cent_deco(int s = 0) {
	s = cent(s, dfs0(s));
	vis[s] = 1;
	kp[0] = 0;
	trav(u, adj[s]) {
		if(vis[u.ff]) continue;
		dfs1(u.ff, mp(u.ss, 1), 0);
		dfs1(u.ff, mp(u.ss, 1), 1);
	}
	trav(u, adj[s]) {
		if(vis[u.ff]) continue;
		dfs1(u.ff, mp(u.ss, 1), 2);
	}
	trav(u, adj[s]) {
		if(vis[u.ff]) continue;
		cent_deco(u.ff);
	}
}

int best_path(int _N, int _K, int e[][2], int w[]) {
	N = _N; K = _K;
	vis.rsz(N);
	adj.rsz(N);
	ssz.rsz(N);
	ans = 0x3f3f3f3f;
	kp = vi(K + 1, ans);
	F0R(i, N - 1) {
		adj[e[i][0]].eb(e[i][1], w[i]);
		adj[e[i][1]].eb(e[i][0], w[i]);
	}
	cent_deco();
	if(ans == 0x3f3f3f3f) ans = -1;
	return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 308 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 312 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 308 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 308 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 312 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 308 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 3 ms 3984 KB Output is correct
23 Correct 2 ms 3284 KB Output is correct
24 Correct 3 ms 3796 KB Output is correct
25 Correct 4 ms 3680 KB Output is correct
26 Correct 2 ms 1620 KB Output is correct
27 Correct 3 ms 3540 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1620 KB Output is correct
30 Correct 2 ms 1748 KB Output is correct
31 Correct 2 ms 2900 KB Output is correct
32 Correct 3 ms 3132 KB Output is correct
33 Correct 3 ms 3392 KB Output is correct
34 Correct 2 ms 2628 KB Output is correct
35 Correct 2 ms 3516 KB Output is correct
36 Correct 3 ms 4052 KB Output is correct
37 Correct 3 ms 3504 KB Output is correct
38 Correct 2 ms 2388 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 308 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 312 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 308 KB Output is correct
19 Correct 125 ms 9376 KB Output is correct
20 Correct 134 ms 9244 KB Output is correct
21 Correct 148 ms 9264 KB Output is correct
22 Correct 118 ms 9488 KB Output is correct
23 Correct 62 ms 9592 KB Output is correct
24 Correct 52 ms 9468 KB Output is correct
25 Correct 113 ms 12712 KB Output is correct
26 Correct 95 ms 16532 KB Output is correct
27 Correct 147 ms 18508 KB Output is correct
28 Correct 234 ms 33084 KB Output is correct
29 Correct 271 ms 32080 KB Output is correct
30 Correct 149 ms 18596 KB Output is correct
31 Correct 180 ms 18588 KB Output is correct
32 Correct 203 ms 18592 KB Output is correct
33 Correct 184 ms 17476 KB Output is correct
34 Correct 170 ms 18364 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 308 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 312 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 308 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 3 ms 3984 KB Output is correct
23 Correct 2 ms 3284 KB Output is correct
24 Correct 3 ms 3796 KB Output is correct
25 Correct 4 ms 3680 KB Output is correct
26 Correct 2 ms 1620 KB Output is correct
27 Correct 3 ms 3540 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1620 KB Output is correct
30 Correct 2 ms 1748 KB Output is correct
31 Correct 2 ms 2900 KB Output is correct
32 Correct 3 ms 3132 KB Output is correct
33 Correct 3 ms 3392 KB Output is correct
34 Correct 2 ms 2628 KB Output is correct
35 Correct 2 ms 3516 KB Output is correct
36 Correct 3 ms 4052 KB Output is correct
37 Correct 3 ms 3504 KB Output is correct
38 Correct 2 ms 2388 KB Output is correct
39 Correct 125 ms 9376 KB Output is correct
40 Correct 134 ms 9244 KB Output is correct
41 Correct 148 ms 9264 KB Output is correct
42 Correct 118 ms 9488 KB Output is correct
43 Correct 62 ms 9592 KB Output is correct
44 Correct 52 ms 9468 KB Output is correct
45 Correct 113 ms 12712 KB Output is correct
46 Correct 95 ms 16532 KB Output is correct
47 Correct 147 ms 18508 KB Output is correct
48 Correct 234 ms 33084 KB Output is correct
49 Correct 271 ms 32080 KB Output is correct
50 Correct 149 ms 18596 KB Output is correct
51 Correct 180 ms 18588 KB Output is correct
52 Correct 203 ms 18592 KB Output is correct
53 Correct 184 ms 17476 KB Output is correct
54 Correct 170 ms 18364 KB Output is correct
55 Correct 8 ms 1236 KB Output is correct
56 Correct 10 ms 1204 KB Output is correct
57 Correct 81 ms 9460 KB Output is correct
58 Correct 31 ms 9212 KB Output is correct
59 Correct 98 ms 17252 KB Output is correct
60 Correct 455 ms 36140 KB Output is correct
61 Correct 163 ms 18772 KB Output is correct
62 Correct 203 ms 22572 KB Output is correct
63 Correct 237 ms 22696 KB Output is correct
64 Correct 485 ms 20984 KB Output is correct
65 Correct 184 ms 19512 KB Output is correct
66 Correct 349 ms 33440 KB Output is correct
67 Correct 92 ms 23264 KB Output is correct
68 Correct 240 ms 23344 KB Output is correct
69 Correct 247 ms 23452 KB Output is correct
70 Correct 212 ms 22392 KB Output is correct