답안 #40998

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
40998 2018-02-11T08:42:03 Z win11905 경주 (Race) (IOI11_race) C++11
100 / 100
938 ms 34684 KB
#include <bits/stdc++.h>
#define P pair<int, int>
#define x first
#define y second
using namespace std;

const int MAXN = 2e5 + 50, MAXK = 1e6 + 50;

int n, k, snode, curmx, ans, cnt, size[MAXN], dp[MAXK], mpath[MAXK];
bool chk[MAXN];
vector<P> g[MAXN];

int dfs(int u, int p) {
	size[u] = 1;
	for(auto v : g[u]) if(!chk[v.x] && v.x != p) {
		dfs(v.x, u);
		size[u] += size[v.x];
	}
	return size[u];
}

void findsen(int u, int p, int d) {
	int mx = (d - size[u]);
	for(auto v : g[u]) if(!chk[v.x] && v.x != p) {
		findsen(v.x, u, d);
		mx = max(mx, size[v.x]);
	}
	if(mx < curmx) snode = u, curmx = mx;
}

void dfs1(int u, int p, int cost, int len, bool fill) {
	if(cost > k) return;
	if(!fill) {
		if(dp[k-cost] == cnt && (len + mpath[k-cost] < ans || ans == -1)) ans = len + mpath[k-cost];
		if(cost == k && (len < ans || ans == -1)) ans = len;
	} else if(dp[cost] < cnt || len < mpath[cost]) dp[cost] = cnt, mpath[cost] = len;
	for(auto v : g[u]) if(!chk[v.x] && v.x != p) dfs1(v.x, u, cost + v.y, len + 1, fill);
}

void process(int u) {
	++cnt;
	if(dfs(u, -1) <= 1) return;
	curmx = size[u] + 1;
	findsen(u, -1, size[u]);
	u = snode;
	for(auto v : g[u]) if(!chk[v.x]) dfs1(v.x, snode, v.y, 1, 0), dfs1(v.x, snode, v.y, 1, 1);
	chk[u] = true;
	for(auto v : g[u]) if(!chk[v.x]) process(v.x);
}

int best_path(int _n, int _k, int h[][2], int l[]) {
	n = _n, k = _k;
	for(int i = 0; i < n-1; ++i) {
		g[h[i][0]].emplace_back(h[i][1], l[i]);
		g[h[i][1]].emplace_back(h[i][0], l[i]);
	}
	cnt = 0;
	ans = -1;
	process(0);
	return ans;
}

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 4984 KB Output is correct
2 Correct 6 ms 5092 KB Output is correct
3 Correct 7 ms 5212 KB Output is correct
4 Correct 6 ms 5236 KB Output is correct
5 Correct 7 ms 5236 KB Output is correct
6 Correct 6 ms 5236 KB Output is correct
7 Correct 6 ms 5236 KB Output is correct
8 Correct 6 ms 5280 KB Output is correct
9 Correct 5 ms 5280 KB Output is correct
10 Correct 6 ms 5360 KB Output is correct
11 Correct 6 ms 5372 KB Output is correct
12 Correct 7 ms 5372 KB Output is correct
13 Correct 6 ms 5372 KB Output is correct
14 Correct 6 ms 5372 KB Output is correct
15 Correct 7 ms 5372 KB Output is correct
16 Correct 5 ms 5372 KB Output is correct
17 Correct 7 ms 5372 KB Output is correct
18 Correct 6 ms 5372 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 4984 KB Output is correct
2 Correct 6 ms 5092 KB Output is correct
3 Correct 7 ms 5212 KB Output is correct
4 Correct 6 ms 5236 KB Output is correct
5 Correct 7 ms 5236 KB Output is correct
6 Correct 6 ms 5236 KB Output is correct
7 Correct 6 ms 5236 KB Output is correct
8 Correct 6 ms 5280 KB Output is correct
9 Correct 5 ms 5280 KB Output is correct
10 Correct 6 ms 5360 KB Output is correct
11 Correct 6 ms 5372 KB Output is correct
12 Correct 7 ms 5372 KB Output is correct
13 Correct 6 ms 5372 KB Output is correct
14 Correct 6 ms 5372 KB Output is correct
15 Correct 7 ms 5372 KB Output is correct
16 Correct 5 ms 5372 KB Output is correct
17 Correct 7 ms 5372 KB Output is correct
18 Correct 6 ms 5372 KB Output is correct
19 Correct 5 ms 5372 KB Output is correct
20 Correct 6 ms 5372 KB Output is correct
21 Correct 7 ms 5372 KB Output is correct
22 Correct 10 ms 10368 KB Output is correct
23 Correct 10 ms 10368 KB Output is correct
24 Correct 12 ms 11132 KB Output is correct
25 Correct 10 ms 11132 KB Output is correct
26 Correct 9 ms 11132 KB Output is correct
27 Correct 6 ms 11132 KB Output is correct
28 Correct 8 ms 11132 KB Output is correct
29 Correct 8 ms 11132 KB Output is correct
30 Correct 10 ms 11132 KB Output is correct
31 Correct 10 ms 11132 KB Output is correct
32 Correct 12 ms 11132 KB Output is correct
33 Correct 11 ms 11132 KB Output is correct
34 Correct 11 ms 11132 KB Output is correct
35 Correct 13 ms 11260 KB Output is correct
36 Correct 12 ms 11772 KB Output is correct
37 Correct 11 ms 11772 KB Output is correct
38 Correct 11 ms 11772 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 4984 KB Output is correct
2 Correct 6 ms 5092 KB Output is correct
3 Correct 7 ms 5212 KB Output is correct
4 Correct 6 ms 5236 KB Output is correct
5 Correct 7 ms 5236 KB Output is correct
6 Correct 6 ms 5236 KB Output is correct
7 Correct 6 ms 5236 KB Output is correct
8 Correct 6 ms 5280 KB Output is correct
9 Correct 5 ms 5280 KB Output is correct
10 Correct 6 ms 5360 KB Output is correct
11 Correct 6 ms 5372 KB Output is correct
12 Correct 7 ms 5372 KB Output is correct
13 Correct 6 ms 5372 KB Output is correct
14 Correct 6 ms 5372 KB Output is correct
15 Correct 7 ms 5372 KB Output is correct
16 Correct 5 ms 5372 KB Output is correct
17 Correct 7 ms 5372 KB Output is correct
18 Correct 6 ms 5372 KB Output is correct
19 Correct 274 ms 11772 KB Output is correct
20 Correct 179 ms 11772 KB Output is correct
21 Correct 224 ms 11772 KB Output is correct
22 Correct 202 ms 11772 KB Output is correct
23 Correct 135 ms 11772 KB Output is correct
24 Correct 113 ms 11772 KB Output is correct
25 Correct 286 ms 14324 KB Output is correct
26 Correct 122 ms 18044 KB Output is correct
27 Correct 286 ms 18044 KB Output is correct
28 Correct 658 ms 30588 KB Output is correct
29 Correct 530 ms 30588 KB Output is correct
30 Correct 335 ms 30588 KB Output is correct
31 Correct 274 ms 30588 KB Output is correct
32 Correct 326 ms 30588 KB Output is correct
33 Correct 537 ms 30588 KB Output is correct
34 Correct 522 ms 30588 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 4984 KB Output is correct
2 Correct 6 ms 5092 KB Output is correct
3 Correct 7 ms 5212 KB Output is correct
4 Correct 6 ms 5236 KB Output is correct
5 Correct 7 ms 5236 KB Output is correct
6 Correct 6 ms 5236 KB Output is correct
7 Correct 6 ms 5236 KB Output is correct
8 Correct 6 ms 5280 KB Output is correct
9 Correct 5 ms 5280 KB Output is correct
10 Correct 6 ms 5360 KB Output is correct
11 Correct 6 ms 5372 KB Output is correct
12 Correct 7 ms 5372 KB Output is correct
13 Correct 6 ms 5372 KB Output is correct
14 Correct 6 ms 5372 KB Output is correct
15 Correct 7 ms 5372 KB Output is correct
16 Correct 5 ms 5372 KB Output is correct
17 Correct 7 ms 5372 KB Output is correct
18 Correct 6 ms 5372 KB Output is correct
19 Correct 5 ms 5372 KB Output is correct
20 Correct 6 ms 5372 KB Output is correct
21 Correct 7 ms 5372 KB Output is correct
22 Correct 10 ms 10368 KB Output is correct
23 Correct 10 ms 10368 KB Output is correct
24 Correct 12 ms 11132 KB Output is correct
25 Correct 10 ms 11132 KB Output is correct
26 Correct 9 ms 11132 KB Output is correct
27 Correct 6 ms 11132 KB Output is correct
28 Correct 8 ms 11132 KB Output is correct
29 Correct 8 ms 11132 KB Output is correct
30 Correct 10 ms 11132 KB Output is correct
31 Correct 10 ms 11132 KB Output is correct
32 Correct 12 ms 11132 KB Output is correct
33 Correct 11 ms 11132 KB Output is correct
34 Correct 11 ms 11132 KB Output is correct
35 Correct 13 ms 11260 KB Output is correct
36 Correct 12 ms 11772 KB Output is correct
37 Correct 11 ms 11772 KB Output is correct
38 Correct 11 ms 11772 KB Output is correct
39 Correct 274 ms 11772 KB Output is correct
40 Correct 179 ms 11772 KB Output is correct
41 Correct 224 ms 11772 KB Output is correct
42 Correct 202 ms 11772 KB Output is correct
43 Correct 135 ms 11772 KB Output is correct
44 Correct 113 ms 11772 KB Output is correct
45 Correct 286 ms 14324 KB Output is correct
46 Correct 122 ms 18044 KB Output is correct
47 Correct 286 ms 18044 KB Output is correct
48 Correct 658 ms 30588 KB Output is correct
49 Correct 530 ms 30588 KB Output is correct
50 Correct 335 ms 30588 KB Output is correct
51 Correct 274 ms 30588 KB Output is correct
52 Correct 326 ms 30588 KB Output is correct
53 Correct 537 ms 30588 KB Output is correct
54 Correct 522 ms 30588 KB Output is correct
55 Correct 19 ms 30588 KB Output is correct
56 Correct 20 ms 30588 KB Output is correct
57 Correct 122 ms 30588 KB Output is correct
58 Correct 52 ms 30588 KB Output is correct
59 Correct 145 ms 30588 KB Output is correct
60 Correct 823 ms 34556 KB Output is correct
61 Correct 287 ms 34556 KB Output is correct
62 Correct 293 ms 34556 KB Output is correct
63 Correct 424 ms 34556 KB Output is correct
64 Correct 938 ms 34556 KB Output is correct
65 Correct 466 ms 34556 KB Output is correct
66 Correct 898 ms 34684 KB Output is correct
67 Correct 185 ms 34684 KB Output is correct
68 Correct 473 ms 34684 KB Output is correct
69 Correct 468 ms 34684 KB Output is correct
70 Correct 428 ms 34684 KB Output is correct