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Submission #100701

# Submission time Handle Problem Language Result Execution time Memory
100701 2019-03-13T14:28:10 Z arman_ferdous Race (IOI11_race) C++17
43 / 100
 3000 ms 34072 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
const int N = 2e5+10;
const int MAX = 1e6+10;

int n, k;
vector< pair<int,int> > g[200010];

int sub[N];
bool Deleted[N];

void dfs(int u, int f) {
	sub[u] = 1;
	for(auto it : g[u]) if(it.first != f && !Deleted[it.first]) {
		dfs(it.first, u);
		sub[u] += sub[it.first];
	}
}

int get_centroid(int u, int f, int lim) {
	int ret = -1;
	for(auto it : g[u]) if(it.first != f && !Deleted[it.first]) {
		if(sub[it.first] * 2 > lim) {
			ret = get_centroid(it.first, u, lim);
			break;
		}
	} if(ret == -1) return u;
	return ret;
}

int F[MAX];
int get_subtree(int u, int f, ll cost, int cnt) {
	int ret = N + N;
	if(cost <= k) ret = F[k - cost] + cnt;
	if(cost == k) ret = min(ret, cnt);

	for(auto it : g[u]) if(it.first != f && !Deleted[it.first])
		ret = min(ret, get_subtree(it.first, u, cost + it.second, cnt + 1));
	return ret;
}

void upd_subtree(int u, int f, ll cost, int cnt) {
	if(cost < MAX) F[cost] = min(F[cost], cnt);
	for(auto it : g[u]) if(it.first != f && !Deleted[it.first]) 
		upd_subtree(it.first, u, cost + it.second, cnt + 1);
}

int calc(int u) {
	for(int i = 0; i <= k; i++) F[i] = N+N;

	int ans = N + N;
	for(auto it : g[u]) if(!Deleted[it.first]) {
		ans = min(ans, get_subtree(it.first, u, it.second, 1));
		upd_subtree(it.first, u, it.second, 1);
	} return ans;
}

int solve(int s) {
	dfs(s,-1);
	int u = get_centroid(s, -1, sub[s]);
	int ret = calc(u);
	Deleted[u] = true;
	for(auto it : g[u]) if(!Deleted[it.first])
		ret = min(ret, solve(it.first));
	return ret;
}

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]].push_back({H[i][1], L[i]});
		g[H[i][1]].push_back({H[i][0], L[i]});
	}
  	int ans = solve(0);
  	if(ans >= N+N) return -1;
  	return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 6 ms 4992 KB Output is correct
6 Correct 6 ms 4992 KB Output is correct
7 Correct 7 ms 4992 KB Output is correct
8 Correct 6 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 6 ms 4992 KB Output is correct
17 Correct 6 ms 4992 KB Output is correct
18 Correct 6 ms 4992 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 6 ms 4992 KB Output is correct
6 Correct 6 ms 4992 KB Output is correct
7 Correct 7 ms 4992 KB Output is correct
8 Correct 6 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 6 ms 4992 KB Output is correct
17 Correct 6 ms 4992 KB Output is correct
18 Correct 6 ms 4992 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 8 ms 5120 KB Output is correct
21 Correct 8 ms 5120 KB Output is correct
22 Correct 452 ms 9080 KB Output is correct
23 Correct 338 ms 8928 KB Output is correct
24 Correct 408 ms 9056 KB Output is correct
25 Correct 399 ms 8540 KB Output is correct
26 Correct 171 ms 8848 KB Output is correct
27 Correct 466 ms 8312 KB Output is correct
28 Correct 115 ms 6648 KB Output is correct
29 Correct 224 ms 6904 KB Output is correct
30 Correct 231 ms 6912 KB Output is correct
31 Correct 339 ms 7680 KB Output is correct
32 Correct 430 ms 7900 KB Output is correct
33 Correct 404 ms 8312 KB Output is correct
34 Correct 268 ms 8824 KB Output is correct
35 Correct 370 ms 8976 KB Output is correct
36 Correct 436 ms 9080 KB Output is correct
37 Correct 319 ms 8312 KB Output is correct
38 Correct 224 ms 7160 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 6 ms 4992 KB Output is correct
6 Correct 6 ms 4992 KB Output is correct
7 Correct 7 ms 4992 KB Output is correct
8 Correct 6 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 6 ms 4992 KB Output is correct
17 Correct 6 ms 4992 KB Output is correct
18 Correct 6 ms 4992 KB Output is correct
19 Correct 239 ms 11768 KB Output is correct
20 Correct 244 ms 11640 KB Output is correct
21 Correct 219 ms 11660 KB Output is correct
22 Correct 172 ms 11896 KB Output is correct
23 Correct 181 ms 12028 KB Output is correct
24 Correct 124 ms 12024 KB Output is correct
25 Correct 286 ms 15224 KB Output is correct
26 Correct 123 ms 17400 KB Output is correct
27 Correct 368 ms 18936 KB Output is correct
28 Correct 813 ms 34072 KB Output is correct
29 Correct 797 ms 33148 KB Output is correct
30 Correct 345 ms 18808 KB Output is correct
31 Correct 310 ms 18808 KB Output is correct
32 Correct 374 ms 18952 KB Output is correct
33 Correct 518 ms 17784 KB Output is correct
34 Correct 633 ms 22392 KB Output is correct

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 6 ms 4992 KB Output is correct
3 Correct 7 ms 4992 KB Output is correct
4 Correct 6 ms 4992 KB Output is correct
5 Correct 6 ms 4992 KB Output is correct
6 Correct 6 ms 4992 KB Output is correct
7 Correct 7 ms 4992 KB Output is correct
8 Correct 6 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 4992 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 6 ms 4992 KB Output is correct
17 Correct 6 ms 4992 KB Output is correct
18 Correct 6 ms 4992 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 8 ms 5120 KB Output is correct
21 Correct 8 ms 5120 KB Output is correct
22 Correct 452 ms 9080 KB Output is correct
23 Correct 338 ms 8928 KB Output is correct
24 Correct 408 ms 9056 KB Output is correct
25 Correct 399 ms 8540 KB Output is correct
26 Correct 171 ms 8848 KB Output is correct
27 Correct 466 ms 8312 KB Output is correct
28 Correct 115 ms 6648 KB Output is correct
29 Correct 224 ms 6904 KB Output is correct
30 Correct 231 ms 6912 KB Output is correct
31 Correct 339 ms 7680 KB Output is correct
32 Correct 430 ms 7900 KB Output is correct
33 Correct 404 ms 8312 KB Output is correct
34 Correct 268 ms 8824 KB Output is correct
35 Correct 370 ms 8976 KB Output is correct
36 Correct 436 ms 9080 KB Output is correct
37 Correct 319 ms 8312 KB Output is correct
38 Correct 224 ms 7160 KB Output is correct
39 Correct 239 ms 11768 KB Output is correct
40 Correct 244 ms 11640 KB Output is correct
41 Correct 219 ms 11660 KB Output is correct
42 Correct 172 ms 11896 KB Output is correct
43 Correct 181 ms 12028 KB Output is correct
44 Correct 124 ms 12024 KB Output is correct
45 Correct 286 ms 15224 KB Output is correct
46 Correct 123 ms 17400 KB Output is correct
47 Correct 368 ms 18936 KB Output is correct
48 Correct 813 ms 34072 KB Output is correct
49 Correct 797 ms 33148 KB Output is correct
50 Correct 345 ms 18808 KB Output is correct
51 Correct 310 ms 18808 KB Output is correct
52 Correct 374 ms 18952 KB Output is correct
53 Correct 518 ms 17784 KB Output is correct
54 Correct 633 ms 22392 KB Output is correct
55 Correct 40 ms 5764 KB Output is correct
56 Correct 18 ms 5632 KB Output is correct
57 Correct 85 ms 11896 KB Output is correct
58 Correct 60 ms 11628 KB Output is correct
59 Execution timed out 3033 ms 18140 KB Time limit exceeded
60 Halted 0 ms 0 KB -