oj.uz

Submission #226761

# Submission time Handle Problem Language Result Execution time Memory
226761 2020-04-25T08:46:45 Z staniewzki Race (IOI11_race) C++17
100 / 100
 1138 ms 39928 KB 
#include<bits/stdc++.h>
using namespace std;
 
#include "race.h"

int best_path(int n, int k, int h[][2], int l[]) {
	vector<vector<pair<int, int>>> adj(n);
	for(int i = 0; i < n - 1; i++) {
		adj[h[i][0]].emplace_back(h[i][1], l[i]);
		adj[h[i][1]].emplace_back(h[i][0], l[i]);
	}

	vector<int> sub(n), del(n);
	function<void(int, int)> get_sub = [&](int v, int p) {
		sub[v] = 1;
		for(auto &[u, w] : adj[v]) {
			if(u != p && !del[u]) {
				get_sub(u, v);
				sub[v] += sub[u];
			}
		}
	};

	function<int(int, int, int)> get_centro = [&](int v, int p, int tree) {
		bool is_centro = true;
		if((tree - sub[v]) * 2 > tree)
			is_centro = false;
		for(auto &[u, w] : adj[v]) {
			if(u != p && !del[u]) {
				int r = get_centro(u, v, tree);
				if(r != -1) return r;
				if(sub[u] * 2 > tree) 
					is_centro = false;
			}
		}
		if(is_centro) return v;
		return -1;
	};

	int inf = 1e9, ans = inf;
	vector<int> opt(k + 1, inf);

	function<void(int, int, int, int, int)> get_ans = [&](int v, int p, int dep, int dst, int type) {
		if(dst > k) return;
		if(type == 1) ans = min(ans, dep + opt[k - dst]);
		if(type == 2) opt[dst] = min(opt[dst], dep);
		if(type == 3) opt[dst] = inf;
		for(auto &[u, w] : adj[v])
			if(u != p && !del[u])
				get_ans(u, v, dep + 1, dst + w, type);
	};

	function<void(int)> decomp = [&](int v) {
		get_sub(v, -1);
		v = get_centro(v, -1, sub[v]);
		opt[0] = 0;
		for(auto &[u, w] : adj[v]) if(!del[u]) {
			get_ans(u, v, 1, w, 1);
			get_ans(u, v, 1, w, 2);
		}
		for(auto &[u, w] : adj[v]) if(!del[u])
			get_ans(u, v, 1, w, 3);
		del[v] = true;
		for(auto &[u, w] : adj[v]) if(!del[u])
			decomp(u);
	};

	decomp(0);
	if(ans >= inf) ans = -1;
	return ans;
}

Compilation message

race.cpp: In lambda function:
race.cpp:16:18: warning: unused variable 'w' [-Wunused-variable]
   for(auto &[u, w] : adj[v]) {
                  ^
race.cpp: In lambda function:
race.cpp:28:18: warning: unused variable 'w' [-Wunused-variable]
   for(auto &[u, w] : adj[v]) {
                  ^
race.cpp: In lambda function:
race.cpp:64:18: warning: unused variable 'w' [-Wunused-variable]
   for(auto &[u, w] : adj[v]) if(!del[u])
                  ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 256 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 6 ms 384 KB Output is correct
22 Correct 7 ms 3968 KB Output is correct
23 Correct 7 ms 3328 KB Output is correct
24 Correct 7 ms 3840 KB Output is correct
25 Correct 8 ms 3712 KB Output is correct
26 Correct 7 ms 1792 KB Output is correct
27 Correct 7 ms 3632 KB Output is correct
28 Correct 6 ms 1280 KB Output is correct
29 Correct 7 ms 1664 KB Output is correct
30 Correct 6 ms 1792 KB Output is correct
31 Correct 7 ms 2944 KB Output is correct
32 Correct 7 ms 3200 KB Output is correct
33 Correct 8 ms 3456 KB Output is correct
34 Correct 6 ms 2816 KB Output is correct
35 Correct 7 ms 3584 KB Output is correct
36 Correct 7 ms 4096 KB Output is correct
37 Correct 7 ms 3584 KB Output is correct
38 Correct 7 ms 2432 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 237 ms 8348 KB Output is correct
20 Correct 278 ms 8356 KB Output is correct
21 Correct 253 ms 8316 KB Output is correct
22 Correct 226 ms 8316 KB Output is correct
23 Correct 135 ms 8568 KB Output is correct
24 Correct 105 ms 8440 KB Output is correct
25 Correct 213 ms 13560 KB Output is correct
26 Correct 191 ms 18772 KB Output is correct
27 Correct 308 ms 16504 KB Output is correct
28 Correct 444 ms 37068 KB Output is correct
29 Correct 581 ms 35576 KB Output is correct
30 Correct 241 ms 16632 KB Output is correct
31 Correct 241 ms 16504 KB Output is correct
32 Correct 312 ms 16632 KB Output is correct
33 Correct 377 ms 15608 KB Output is correct
34 Correct 316 ms 15352 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 4 ms 256 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 6 ms 384 KB Output is correct
22 Correct 7 ms 3968 KB Output is correct
23 Correct 7 ms 3328 KB Output is correct
24 Correct 7 ms 3840 KB Output is correct
25 Correct 8 ms 3712 KB Output is correct
26 Correct 7 ms 1792 KB Output is correct
27 Correct 7 ms 3632 KB Output is correct
28 Correct 6 ms 1280 KB Output is correct
29 Correct 7 ms 1664 KB Output is correct
30 Correct 6 ms 1792 KB Output is correct
31 Correct 7 ms 2944 KB Output is correct
32 Correct 7 ms 3200 KB Output is correct
33 Correct 8 ms 3456 KB Output is correct
34 Correct 6 ms 2816 KB Output is correct
35 Correct 7 ms 3584 KB Output is correct
36 Correct 7 ms 4096 KB Output is correct
37 Correct 7 ms 3584 KB Output is correct
38 Correct 7 ms 2432 KB Output is correct
39 Correct 237 ms 8348 KB Output is correct
40 Correct 278 ms 8356 KB Output is correct
41 Correct 253 ms 8316 KB Output is correct
42 Correct 226 ms 8316 KB Output is correct
43 Correct 135 ms 8568 KB Output is correct
44 Correct 105 ms 8440 KB Output is correct
45 Correct 213 ms 13560 KB Output is correct
46 Correct 191 ms 18772 KB Output is correct
47 Correct 308 ms 16504 KB Output is correct
48 Correct 444 ms 37068 KB Output is correct
49 Correct 581 ms 35576 KB Output is correct
50 Correct 241 ms 16632 KB Output is correct
51 Correct 241 ms 16504 KB Output is correct
52 Correct 312 ms 16632 KB Output is correct
53 Correct 377 ms 15608 KB Output is correct
54 Correct 316 ms 15352 KB Output is correct
55 Correct 18 ms 1152 KB Output is correct
56 Correct 20 ms 1152 KB Output is correct
57 Correct 156 ms 8568 KB Output is correct
58 Correct 51 ms 8556 KB Output is correct
59 Correct 179 ms 19528 KB Output is correct
60 Correct 1138 ms 39928 KB Output is correct
61 Correct 335 ms 16504 KB Output is correct
62 Correct 304 ms 20472 KB Output is correct
63 Correct 441 ms 20344 KB Output is correct
64 Correct 909 ms 18452 KB Output is correct
65 Correct 376 ms 16508 KB Output is correct
66 Correct 741 ms 35952 KB Output is correct
67 Correct 160 ms 20584 KB Output is correct
68 Correct 423 ms 20472 KB Output is correct
69 Correct 425 ms 20600 KB Output is correct
70 Correct 547 ms 19832 KB Output is correct