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답안 #386967

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
386967 2021-04-07T17:14:53 Z dongliu0426 경주 (Race) (IOI11_race) C++17
100 / 100
 1041 ms 28652 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 200010;
const int MAXK = 1000010;
const int M = 2 * MAXN;
const int inf = 0x3f3f3f3f;

int hd[MAXN], nx[M], to[M], wt[M], ei = 0;
 
inline void link(int i, int j, int kk) {
	nx[++ei] = hd[i], wt[ei] = kk, hd[i] = ei, to[ei] = j;
}
 
int n, k, ss[MAXN], dep, cc[MAXK], ans;
bool vv[MAXN];
 
int subtree(int x, int p = 0) {
	ss[x] = 1;
	for (int j = hd[x], y; j; j = nx[j])
		if (!vv[y = to[j]] && y != p)
			ss[x] += subtree(y, x);
	return ss[x];
}
 
int centroid(int dd, int x, int p = 0) {
	for (int j = hd[x], y; j; j = nx[j])
		if (!vv[y = to[j]] && y != p && ss[y] > dd)
			return centroid(dd, y, x);
	return x;
}

void _fill(int x, int p, int w, int d) {
	if (w > k) return;
	cc[w] = min(cc[w], d);
	dep = max(dep, w);
	for (int j = hd[x], y; j; j = nx[j])
		if (!vv[y = to[j]] && y != p)
			_fill(y, x, w + wt[j], d + 1);
}

void _count(int x, int p, int w, int d) {
	if (w > k) return;
	ans = min(ans, d + cc[k - w]);
	for (int j = hd[x], y; j; j = nx[j])
		if (!vv[y = to[j]] && y != p)
			_count(y, x, w + wt[j], d + 1);
}
 
void decomp(int x = 1) {
	int c = centroid(subtree(x) / 2, x);
	dep = 0, vv[c] = 1;
	for (int j = hd[c], y; j; j = nx[j])
		if (!vv[y = to[j]]) {
			_count(y, c, wt[j], 1);
			_fill(y, c, wt[j], 1);
		}
	for (int i = 1; i <= dep; ++i) cc[i] = inf;
	for (int j = hd[c], y; j; j = nx[j])
		if (!vv[y = to[j]])
			decomp(y);
}


int best_path(int N, int K, int H[][2], int L[]){
	n = N, k = K;
	memset(vv, 0, sizeof(vv));
	memset(hd, 0, sizeof(hd));
	ans = inf, ei = 0;
	for (int i = 0; i + 1 < n; ++i) {
		++H[i][0], ++H[i][1];
		link(H[i][0], H[i][1], L[i]);
		link(H[i][1], H[i][0], L[i]);
	}
	memset(cc, 0x3f, sizeof(cc)); cc[0] = 0;
	decomp();
	return (ans == inf ? -1 : ans);
}

/**

int main() {
	scanf("%d%d", &n, &k);
	memset(vv, 0, sizeof(vv));
	memset(hd, 0, sizeof(hd));
	ans = inf, ei = 0;
	for (int i = 1, x, y, z; i < n; ++i) {
		scanf("%d%d%d", &x, &y, &z); ++x, ++y;
		link(x, y, z), link(y, x, z);
	}
	memset(cc, 0x3f, sizeof(cc)); cc[0] = 0;
	decomp();
	printf("%d\n", (ans == inf ? -1 : ans));
}

**/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5228 KB Output is correct
2 Correct 3 ms 5228 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Correct 3 ms 5228 KB Output is correct
5 Correct 3 ms 5228 KB Output is correct
6 Correct 3 ms 5228 KB Output is correct
7 Correct 3 ms 5228 KB Output is correct
8 Correct 4 ms 5228 KB Output is correct
9 Correct 3 ms 5228 KB Output is correct
10 Correct 3 ms 5228 KB Output is correct
11 Correct 3 ms 5228 KB Output is correct
12 Correct 4 ms 5228 KB Output is correct
13 Correct 5 ms 5228 KB Output is correct
14 Correct 4 ms 5228 KB Output is correct
15 Correct 4 ms 5228 KB Output is correct
16 Correct 3 ms 5228 KB Output is correct
17 Correct 3 ms 5228 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5228 KB Output is correct
2 Correct 3 ms 5228 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Correct 3 ms 5228 KB Output is correct
5 Correct 3 ms 5228 KB Output is correct
6 Correct 3 ms 5228 KB Output is correct
7 Correct 3 ms 5228 KB Output is correct
8 Correct 4 ms 5228 KB Output is correct
9 Correct 3 ms 5228 KB Output is correct
10 Correct 3 ms 5228 KB Output is correct
11 Correct 3 ms 5228 KB Output is correct
12 Correct 4 ms 5228 KB Output is correct
13 Correct 5 ms 5228 KB Output is correct
14 Correct 4 ms 5228 KB Output is correct
15 Correct 4 ms 5228 KB Output is correct
16 Correct 3 ms 5228 KB Output is correct
17 Correct 3 ms 5228 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 3 ms 5228 KB Output is correct
20 Correct 3 ms 5228 KB Output is correct
21 Correct 4 ms 5356 KB Output is correct
22 Correct 149 ms 5356 KB Output is correct
23 Correct 104 ms 5356 KB Output is correct
24 Correct 129 ms 5356 KB Output is correct
25 Correct 25 ms 5356 KB Output is correct
26 Correct 52 ms 5356 KB Output is correct
27 Correct 4 ms 5356 KB Output is correct
28 Correct 19 ms 5356 KB Output is correct
29 Correct 20 ms 5356 KB Output is correct
30 Correct 21 ms 5356 KB Output is correct
31 Correct 21 ms 5356 KB Output is correct
32 Correct 22 ms 5356 KB Output is correct
33 Correct 27 ms 5356 KB Output is correct
34 Correct 29 ms 5356 KB Output is correct
35 Correct 32 ms 5356 KB Output is correct
36 Correct 35 ms 5484 KB Output is correct
37 Correct 8 ms 5356 KB Output is correct
38 Correct 7 ms 5356 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5228 KB Output is correct
2 Correct 3 ms 5228 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Correct 3 ms 5228 KB Output is correct
5 Correct 3 ms 5228 KB Output is correct
6 Correct 3 ms 5228 KB Output is correct
7 Correct 3 ms 5228 KB Output is correct
8 Correct 4 ms 5228 KB Output is correct
9 Correct 3 ms 5228 KB Output is correct
10 Correct 3 ms 5228 KB Output is correct
11 Correct 3 ms 5228 KB Output is correct
12 Correct 4 ms 5228 KB Output is correct
13 Correct 5 ms 5228 KB Output is correct
14 Correct 4 ms 5228 KB Output is correct
15 Correct 4 ms 5228 KB Output is correct
16 Correct 3 ms 5228 KB Output is correct
17 Correct 3 ms 5228 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 126 ms 10568 KB Output is correct
20 Correct 119 ms 10476 KB Output is correct
21 Correct 132 ms 10476 KB Output is correct
22 Correct 118 ms 10548 KB Output is correct
23 Correct 69 ms 10604 KB Output is correct
24 Correct 50 ms 10604 KB Output is correct
25 Correct 110 ms 13932 KB Output is correct
26 Correct 92 ms 16748 KB Output is correct
27 Correct 140 ms 15980 KB Output is correct
28 Correct 195 ms 28652 KB Output is correct
29 Correct 203 ms 27756 KB Output is correct
30 Correct 143 ms 15980 KB Output is correct
31 Correct 143 ms 16004 KB Output is correct
32 Correct 192 ms 16184 KB Output is correct
33 Correct 168 ms 16108 KB Output is correct
34 Correct 138 ms 17004 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5228 KB Output is correct
2 Correct 3 ms 5228 KB Output is correct
3 Correct 3 ms 5228 KB Output is correct
4 Correct 3 ms 5228 KB Output is correct
5 Correct 3 ms 5228 KB Output is correct
6 Correct 3 ms 5228 KB Output is correct
7 Correct 3 ms 5228 KB Output is correct
8 Correct 4 ms 5228 KB Output is correct
9 Correct 3 ms 5228 KB Output is correct
10 Correct 3 ms 5228 KB Output is correct
11 Correct 3 ms 5228 KB Output is correct
12 Correct 4 ms 5228 KB Output is correct
13 Correct 5 ms 5228 KB Output is correct
14 Correct 4 ms 5228 KB Output is correct
15 Correct 4 ms 5228 KB Output is correct
16 Correct 3 ms 5228 KB Output is correct
17 Correct 3 ms 5228 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 3 ms 5228 KB Output is correct
20 Correct 3 ms 5228 KB Output is correct
21 Correct 4 ms 5356 KB Output is correct
22 Correct 149 ms 5356 KB Output is correct
23 Correct 104 ms 5356 KB Output is correct
24 Correct 129 ms 5356 KB Output is correct
25 Correct 25 ms 5356 KB Output is correct
26 Correct 52 ms 5356 KB Output is correct
27 Correct 4 ms 5356 KB Output is correct
28 Correct 19 ms 5356 KB Output is correct
29 Correct 20 ms 5356 KB Output is correct
30 Correct 21 ms 5356 KB Output is correct
31 Correct 21 ms 5356 KB Output is correct
32 Correct 22 ms 5356 KB Output is correct
33 Correct 27 ms 5356 KB Output is correct
34 Correct 29 ms 5356 KB Output is correct
35 Correct 32 ms 5356 KB Output is correct
36 Correct 35 ms 5484 KB Output is correct
37 Correct 8 ms 5356 KB Output is correct
38 Correct 7 ms 5356 KB Output is correct
39 Correct 126 ms 10568 KB Output is correct
40 Correct 119 ms 10476 KB Output is correct
41 Correct 132 ms 10476 KB Output is correct
42 Correct 118 ms 10548 KB Output is correct
43 Correct 69 ms 10604 KB Output is correct
44 Correct 50 ms 10604 KB Output is correct
45 Correct 110 ms 13932 KB Output is correct
46 Correct 92 ms 16748 KB Output is correct
47 Correct 140 ms 15980 KB Output is correct
48 Correct 195 ms 28652 KB Output is correct
49 Correct 203 ms 27756 KB Output is correct
50 Correct 143 ms 15980 KB Output is correct
51 Correct 143 ms 16004 KB Output is correct
52 Correct 192 ms 16184 KB Output is correct
53 Correct 168 ms 16108 KB Output is correct
54 Correct 138 ms 17004 KB Output is correct
55 Correct 14 ms 5740 KB Output is correct
56 Correct 13 ms 5740 KB Output is correct
57 Correct 79 ms 10476 KB Output is correct
58 Correct 36 ms 10220 KB Output is correct
59 Correct 98 ms 16876 KB Output is correct
60 Correct 308 ms 27884 KB Output is correct
61 Correct 174 ms 16172 KB Output is correct
62 Correct 181 ms 16108 KB Output is correct
63 Correct 251 ms 16228 KB Output is correct
64 Correct 1041 ms 16580 KB Output is correct
65 Correct 162 ms 16876 KB Output is correct
66 Correct 590 ms 25836 KB Output is correct
67 Correct 84 ms 16492 KB Output is correct
68 Correct 404 ms 16588 KB Output is correct
69 Correct 394 ms 16860 KB Output is correct
70 Correct 377 ms 16096 KB Output is correct